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Monday, February 23, 2015

Key Ukraine town under rebel control, separatists celebrate

February 19, 2015

DEBALTSEVE, Ukraine (AP) — For the rebel fighters who seized control of this strategic town, Thursday was a day of jubilation and bragging of victory. The retreating Ukrainian soldiers were grim, stunned and relieved to have escaped with their lives as the scope of their losses became clearer: at least 13 dead and hundreds missing, captured or wounded.

Rebel fighters roamed the debris-littered streets of Debaltseve, laughing, hugging and posing for photos a day after the fall of the furiously contested railway hub. Associated Press journalists found its neighborhoods destroyed and all under the control of the rebels.

On the road out of town, dozens of Ukrainian military vehicles, many riddled with bullet holes and with their windshields smashed, were heading to the government-held city of Artemivsk. The soldiers inside described weeks of harrowing rebel shelling, followed by a hasty retreat.

"We left under heavy fire, driving on back roads," said a soldier who gave only his first name, Andrei. "As we were leaving, we were attacked by artillery and grenade launchers. We came under repeated attack by tanks and assault groups."

As rebels waved separatist flags, Nikolai Kozitsyn, a Russian Cossack leader and prominent warlord in the rebel-controlled east, drove around in a Humvee-like vehicle captured from Ukrainian troops. All around lay the wrecked remains of Ukrainian armored vehicles. Rebel fighters, many of them Cossacks, searched through the bunkers and tents of an abandoned military encampment, looking to salvage equipment and clothing left behind.

Two rebel fighters inspected an abandoned tank, declaring it a "gift" from the Ukrainian army. They then grabbed a bloodied blue-and-yellow Ukrainian flag and ground it into the frozen earth with their boots.

But in a reminder of the dangers, one vehicle carrying Cossacks hit a land mine, killing one rebel fighter and wounding another. Cossacks, who spearheaded imperial Russia's expansion and helped guard its far-flung outposts, trace their historic roots to both Ukraine and southern Russia. They faced persecution under Bolshevik rule but resurfaced after the 1991 Soviet collapse and are now recognized in Russia as an ethnic group who consider themselves descendants of the czarist-era horsemen.

By Thursday, 90 percent of government forces had been withdrawn, a military spokesman said, though he gave no precise figure. Late Wednesday, President Petro Poroshenko said 2,475 soldiers were safely pulled out.

The official toll stood at 13 soldiers killed, 157 wounded, more than 90 captured and at least 82 missing. But retreating soldiers spoke of many more casualties during a hasty and disorderly withdrawal, and the death toll was likely to rise.

Rebel leaders also claimed the Ukrainian casualties were far higher and bragged about seizing large numbers of heavy weapons abandoned by the government forces. The capture of Debaltseve, a key railroad junction that straddles the route between the separatists' two main cities, Donetsk and Luhansk, was a significant military victory for the rebels.

However, Ukrainian military spokesman Andriy Lysenko said the three-week siege had left the town's infrastructure in ruins. "A strategic rail hub has stopped its existence the way it was," he said Thursday in Kiev, the Ukrainian capital.

The retreating soldiers appeared shell-shocked as they described the harrowing battle. "Starting at night, they would fire at us just to stop us from sleeping. They did this all night," said Andrei, the Ukrainian soldier. "Then in the morning, they would attack, wave after wave. They did this constantly for three weeks."

The battle for Debaltseve defied a cease-fire for eastern Ukraine that was supposed to go into effect Sunday. While the truce mostly held elsewhere, Ukrainian military spokesman Anatoliy Stelmakh said the rebels had repeatedly shelled a village on the outskirts of the strategic port city of Mariupol over the past 24 hours.

The war in eastern Ukraine has killed more than 5,600 people and forced over a million to flee their homes since fighting began in April, a month after Russia annexed the mostly Russian-speaking Crimean Peninsula. Russia denies arming the rebels or supplying fighters, but Western nations and NATO point to satellite pictures of Russian military equipment in eastern Ukraine.

In Paris, French President Francois Hollande said he and German Chancellor Angela Merkel spoke Thursday with the Ukrainian and Russian leaders about cease-fire violations and their consequences. The Kremlin confirmed the four leaders spoke by phone and praised the cease-fire deal, saying it has led to "a reduction in the number of civilian casualties."

France and Germany, which oversaw marathon peace talks last week between Poroshenko and Russian President Vladimir Putin in the Belorussian capital, Minsk, both signaled they were determined to salvage the cease-fire agreement and keep the two sides talking.

The German government said the four leaders had agreed "to stick to the Minsk agreements despite the serious breach of the cease-fire in Debaltseve." It said "immediate concrete steps" were necessary to ensure the truce is fully implemented and heavy weapons are withdrawn.

The warring sides were supposed to pull back their heavy weapons from the front lines beginning Tuesday, but international monitors said they had not seen either doing so. "We have not observed the withdrawal of heavy weapons, however we have observed and reported on the movement of heavy weapons," said Michael Bociurkiw of the Organization for Security and Cooperation in Europe.

Poroshenko suggested that the European Union deploy a peacekeeping mission to help ensure the observance of the cease-fire, but the EU has remained non-committal and Russia reacted negatively, saying that the OSCE monitors could do the job.

Paris and Berlin appeared to hope that, with the disputed territory of Debaltseve in rebel hands, the cease-fire can now take hold. A top French official, speaking on condition of anonymity because he was not authorized to talk about the ongoing negotiations, described the attitude as "pragmatic," saying continued fighting "was not acceptable to us."

Germany has lowered expectations for the cease-fire in Ukraine. Merkel told supporters that "Germany and France together, will not ease off on doing everything so that Ukraine can go its way and have its territorial integrity — but we want to do it with Russia, not against Russia."

Analysts said that despite public anger in Kiev over the fall of Debaltseve, an overall cease-fire for eastern Ukraine was probably more important than who controlled one town. Germany is "more clearly aware than many in Kiev that Ukraine basically needs a cease-fire or a freezing of the conflict more urgently than Moscow," said Gustav Gressel, a visiting fellow at the European Council on Foreign Relations in Berlin. "Kiev needs to see sooner or later how it gets out of the war."

Associated Press writers Balint Szlanko in Artemivsk, Ukraine; Jim Heintz in Kiev, Laura Mills in Moscow, Lori Hinnant in Paris, and Geir Moulson in Berlin contributed to this report.

Greek premier: difficulties lie ahead on bailout

February 21, 2015

ATHENS, Greece (AP) — Greek prime minister Alexis Tsipras hailed the "important success" of Greece's negotiations and what he called "the end of austerity and the bailout" but warned Greeks that difficult negotiations lie ahead.

"We won a battle, but not the war. The difficulties lie ahead of us," Tsipras said in a TV appearance made on very short notice. The Greek government is facing a Monday deadline to come up with credible reform proposals to extend the existing bailout deal and the drafting of a new one.

Tsipras is meeting with his inner cabinet later Saturday to discuss the proposals. Friday's agreement to extend the country's rescue loans, although conditional, was greeted with relief by many people as a first step forward and away from the crushing austerity of recent years.

Others were more skeptical, wondering whether the left-wing Syriza government will be able to keep even a fraction of its promises and how it will find the money to finance them.

Tensions up in Venezuela as police arrest opposition leader

February 20, 2015

CARACAS, Venezuela (AP) — Police broke into Caracas Mayor Antonio Ledezma's office and carted off the longtime critic of Venezuela's socialist government, adding to tensions on the anniversary of the outbreak of protests that paralyzed the nation a year ago.

President Nicolas Maduro took to television and radio to say that Ledezma, one of the most vocal opposition leaders, would be punished for trying to sow unrest in Venezuela, which is struggling with severe economic problems.

Emotions were already running high before dozens of men in flak jackets and camouflage uniforms smashed down the door of Ledezma's office and forcibly carried him out of the building. As news of the incursion spread across the capital, people spontaneously banged pots from their windows in protest while drivers tapped rhythms on their car horns in rush hour traffic. As night fell, a few dozen people vented their anger in front of the headquarters of the intelligence service police, where Ledezma was thought to be.

"He'll be held accountable for all his crimes," Maduro said in a speech that TV and radio stations across the country were required to carry. Last week, Maduro named Ledezma among government critics and Western powers he accused of plotting a coup to bring down the government, one of more than a dozen such denunciations Maduro has made since taking power in 2013. Ledezma mocked the accusation in multiple interviews, saying the real destabilizing force in Venezuela was the government's corruption.

Tensions have been running high in Venezuela this week, with the one-year anniversary of the start of weeks of anti-government street protests that choked the country with tear gas and smoke from flaming barricades and resulted in more than 40 deaths. National police arrested several other mayors and former mayors during that unrest, including Leopoldo Lopez, who is considered by human rights groups as Latin America's most high-profile political prisoner.

Allies of Ledezma called for more protests Friday to demand his immediate release, a call echoed by Human Rights Watch. The U.S. State Department, meanwhile, called the Venezuelan government's accusations of coup-plotting "baseless and false" and said they are meant to draw attention away from mounting economic problems such as widespread shortages and inflation that reached 68 percent last year.

"The Venezuelan government needs to deal with the grave situation it faces," the State Department said in a statement. Ledezma, Lopez and other hard-line leaders of the opposition had marked the anniversary of last year's protests with a call for a national pact establishing a transitional government to rescue Venezuela from a coming "humanitarian emergency."

Maduro on Thursday flashed a copy of the Feb. 11 statement and called it a green light and political cover for his opponents to launch a coup. The mayor has been a thorn in the side of the ruling party since he won the mayor's post in 2008, beating out a member of the socialist party led by the late President Hugo Chavez.

The government subsequently transferred nearly all of Ledezma's powers, including control of police and schools, to a newly created government entity. Ledezma responded with a hunger strike that drew international attention and cemented his status as symbol for what the opposition calls the government's efforts to marginalize elected officials who do not fall in line.

His arrest was captured on surveillance video, clips of which rocketed around social media. A group of men in black and gray camouflage, wearing bulletproof vests, can be seen forcefully hustling the 59 year-old politician from his building.

A member of Ledezma's security team, who was not authorized to give his name, said the armed officers, some of them wearing masks, used their weapons to break the door to the mayor's office and haul him away.

Opposition lawmaker Ismael Garcia wrote on Twitter that he saw Ledezma carried away. "They took him out of his office like he was a dog," he wrote.

Caracas mayor who opposed government violently arrested

February 20, 2015

CARACAS, Venezuela (AP) — Police in camouflaged uniforms smashed into the office of Caracas Mayor Antonio Ledezma on Thursday and carried the opposition leader away in a move heightening political tensions in the socialist-run South American country.

President Nicolas Maduro announced that Ledezma, one of his most vocal critics, would be punished for his efforts to sow unrest. Reports of the detention set off protests around the city, where people spontaneously banged pots from their windows or tapped rhythms on their car horns amid rush hour traffic. As night fell, a few dozen gathered to vent their anger in front of the headquarters of the intelligence service police where Ledezma is believed to be held.

"He'll be held accountable for all his crimes," Maduro said in comments that TV and radio stations across the country were required to carry. Last week, Maduro named Ledezma among government critics and Western powers he accused of plotting a coup to bring down his socialist government, one of more than a dozen such denunciations Maduro has made since taking power in 2013. Ledezma mocked the accusation in multiple interviews, saying the real destabilizing force in Venezuela was the government's corruption.

Tensions have been running high in Venezuela this week, with the one-year anniversary of the start of weeks of anti-government street protests that choked the country with tear gas and smoke from flaming barricades and resulted in more than 40 deaths. National police arrested several other mayors and former mayors during last year's unrest, including Leopoldo Lopez, who is considered by human rights groups as Latin America's most high-profile political prisoner.

Allies of the 59-year-old mayor called for more protests Friday to demand his immediate release, a call echoed by Human Rights Watch. The U.S. State Department called Venezuela's accusations of coup-plotting "baseless and false" and intended to direct attention away from mounting economic problems such as widespread shortages and galloping inflation that reached 68 percent last year.

"The Venezuelan government needs to deal with the grave situation it faces," the State Department said in a statement. Ledezma has been a thorn in the side of the ruling party since he won the mayorship in 2008, beating out a member of the socialist party led by the late President Hugo Chavez.

The government subsequently transferred nearly all of Ledezma's powers, including control of police and schools, to a newly created government entity. Ledezma responded with a hunger strike that drew international attention and cemented his status as symbol for what the opposition calls the government's efforts to marginalize elected officials who do not fall in line.

His arrest was captured on surveillance video, clips of which rocketed around social media. A group of men in black and gray camouflage, wearing bulletproof vests, can be seen forcefully hustling the 59 year-old politician from his building.

A member of Ledezma's security team, who was not authorized to give his name, said the armed officers, some of them wearing masks, used their weapons to break the door to the mayor's office and haul him away.

Angara-A5 Launch Opens New Page in Russia's Space Exploration

Moscow (Sputnik)
Dec 24, 2014

The successful launch of Russia's newest heavy rocket, the Angara A5, from the Plesetsk Cosmodrome, is a significant milestone in the history of Russia's rocket industry, providing the state with independent access to space.

The collapse of the USSR in the beginning of 1990s resulted in dissolution of the Soviet airspace industry infrastructure: plants and design bureaus located in former republics were divided from Russia by new interstate borders.

The state became highly dependent on its neighbors, particularly Ukraine, where space boosters were produced and maintained. Furthermore, Ukraine has been providing technical support for Russia's space launch vehicles as well as intercontinental ballistic missiles.

For decades Russia has been unable to substitute Ukrainian Zenit, Dnepr and Cyclone rockets. For instance, Zenit-3SL has become a key component of ambitious "Sea Launch" project - a mobile maritime platform designed to launch commercial payloads from equatorial waters.

Meanwhile, Cyclone rockets, made in Dnepropetrovsk, have already been launched from the Plesetsk Cosmodrome more than 120 times, according to Russian Ministry of Defense. Evidently, the Russian and Ukrainian space and military industries still have strong ties, due to the Soviet legacy. However, in the light of the ongoing political and economic crisis in Ukraine, Russia's independence in space industry has become the issue of primary importance.

"At 08:57 Moscow time (11:57 GMT), the heavy-class rocket Angara-A5 was launched by a Space Forces crew of the Arkhangelsk Region from the universal launch site of the state test facility of the Russian Defense Ministry [the Plesetsk Cosmodrome]," the official statement reads, as cited by RT.

President Putin, who was monitoring the launch from Moscow, congratulated Defense Minister Sergey Shoigu and his counterparts on the success of the operation. According to the plan, the rocket should deliver a dummy two-ton payload to geostationary orbit, 36,000 kilometers above the Equator.

The Angara-A5, a heavy-class rocket, weighs 773 tons and can carry a payload of up to 25 tons. The largest rocket in the Angara rocket family is the Angara-A7, which weighs 1133 tons, and can deliver about 35 tons of payload to low orbit (193-220 km) and 7.6 tons - to geostationary orbit (more than 35,000 km).

The rocket is equipped with the advanced RD-191 engine, which uses fuel based on kerosene and oxygen, considered one of the most "eco-friendly" propulsion methods.

Earlier this year, Russia tested its "light" Angara 1.2PP rocket. Although the first attempt to launch the Angara 1.2PP on June 27 2014 was halted just seconds prior to take-off, it was successfully launched at the beginning of July.

The Angara is Russia's first airspace rocket created since the collapse of the Soviet Union. The project was designed by the Moscow-based Khrunichev State Research and Production Space Center and includes every type of booster needed for Russia's future space projects. It took almost two decades and about $3 billion to develop the brand new rocket from scratch.

Currently Khrunichev is able to produce about ten Angara-5 rockets per year and will increase the production "if there is demand," according to the first deputy director at the Khrunichev Center, Aleksandr Medvedev, as quoted by RT.

The new rockets will replace the outgoing Proton and Soyuz, built by the famous Soviet designer Sergey Korolev, as well as the Zenit, Dnepr and Cyclone boosters manufactured in Ukraine and currently used in the Russian space program.

It looks like Russia is gradually regaining its leading position in space. In November 2014, Roscosmos, the Russian space agency, announced it was considering the construction of a new orbital station from 2017, after fulfilling its obligations regarding the International Space Station. Along with the new Angara rockets, it will allow Russia to bolster its space exploration and to gain new competitive advantages, making the state's space industry completely independent and self-sufficient.

Source: Space Daily.
Link: http://www.spacedaily.com/reports/Angara_A5_Launch_Opens_New_Page_in_Russias_Space_Exploration_999.html.

SpaceX Completes First Milestone for Commercial Crew System

Washington DC (SPX)
Dec 23, 2014

NASA has approved the completion of SpaceX's first milestone in the company's path toward launching crews to the International Space Station (ISS) from U.S. soil under a Commercial Crew Transportation Capability (CCtCap) contract with the agency.

During the Certification Baseline Review, SpaceX described its current design baseline including how the company plans to manufacture its Crew Dragon spacecraft and Falcon 9 v.1.1 rocket, then launch, fly, land and recover the crew. The company also outlined how it will achieve NASA certification of its system to enable transport of crews to and from the space station.

"This milestone sets the pace for the rigorous work ahead as SpaceX meets the certification requirements outlined in our contract," said Kathy Lueders, manager of NASA's Commercial Crew Program.

"It is very exciting to see SpaceX's proposed path to certification, including a flight test phase and completion of the system development."

On Sept. 16, the agency unveiled its selection of SpaceX and Boeing to transport U.S. crews to and from the space station using their Crew Dragon and CST-100 spacecraft, respectively. These contracts will end the nation's sole reliance on Russia and allow the station's current crew of six to increase, enabling more research aboard the unique microgravity laboratory.

Under the CCtCap contracts, the companies will complete NASA certification of their human space transportation systems, including a crewed flight test with at least one NASA astronaut aboard, to verify the fully integrated rocket and spacecraft system can launch from the United States, maneuver in orbit, and dock to the space station, and validate its systems perform as expected.

Throughout the next few years, SpaceX will test its systems, materials and concept of operations to the limits to prove they are safe to transport astronauts to the station.

Once certified, the Crew Dragon spacecraft and Falcon 9 v1.1 rocket will be processed and integrated inside a new hangar before being rolled out for launch. This will all take place at the historic Launch Complex 39A at NASA's Kennedy Space Center in Florida.

The Crew Dragon is expected to be able to dock to the station for up to 210 days and serve as a 24-hour safe haven during an emergency in space.

"SpaceX designed the Dragon spacecraft with the ultimate goal of transporting people to space," said Gwynne Shotwell, SpaceX President and Chief Operating Officer. "Successful completion of the Certification Baseline Review represents a critical step in that effort-we applaud our team's hard work to date and look forward to helping NASA return the transport of U.S. astronauts to American soil."

By expanding the station crew size and enabling private companies to handle launches to low-Earth orbit -- a region NASA has been visiting since 1962 -- the nation's space agency can focus on getting the most research and experience out of America's investment in ISS.

NASA also can expand its focus to develop the Space Launch System and Orion capsule for missions in the proving ground of deep space beyond the moon to advance the skills and techniques that will enable humans to explore Mars.

Source: Space Daily.
Link: http://www.spacedaily.com/reports/SpaceX_Completes_First_Milestone_for_Commercial_Crew_Transportation_System_999.html.

Milky Way has new neighbor, KKs3

by Brooks Hays
Nizhny Arkhyz, Russia (UPI)
Dec 23, 2014

The Milky Way galaxy has a new cosmic neighbor -- galaxy KKs3 -- discovered thanks to newly collected data courtesy of NASA's Hubble Space Telescope.

The dwarf spheroidal galaxy lies 700 million miles away and is located in the southern sky in vicinity of the constellation Hydrus. It's only the second known isolated dwarf spheroidal galaxy in the Local Group, a collection of some 54 galaxies that includes both the Milky Way and Andromeda galaxies.

With a seemingly never-ending stream of cosmic data for astronomers to parse -- collected by dozens of observatories, on the ground and in the sky -- finding a tiny galaxy amid the noise is not easy. The total mass of KKs3's stars is about one ten-thousandth the total of the Milky Way's material.

"Finding objects like KKs3 is painstaking work, even with observatories like the Hubble Space Telescope," Dimitry Makarov, a researcher at Russia's Special Astrophysical Observatory and the leader of the Russian-American team that discovered the galaxy, said in a recent press release.

"But with persistence, we're slowly building up a map of our local neighborhood, which turns out to be less empty than we thought," Makarov added. "It may be that are a huge number of dwarf spheroidal galaxies out there, something that would have profound consequences for our ideas about the evolution of the cosmos."

Researchers hope the task of locating other tiny galactic neighbors like KKs3 will become a bit easier when the massive James Webb Space Telescope and the European Extremely Large Telescope come online in the near future.

The discovery of Makarov and his colleagues was detailed this week in the Monthly Notices of The Royal Astronomical Society.

Source: Space Daily.
Link: http://www.spacedaily.com/reports/Milky_Way_has_new_neighbor_KKs3_999.html.

'Shooting the Moon' with Satellite Laser Ranging

Washington DC (SPX)
Dec 23, 2014

Laser ranging from Earth to NASA's Lunar Reconnaissance Orbiter (LRO) was a milestone in the 50-year history of satellite laser ranging. Launched in 2009 and still orbiting the moon in 2014, LRO was the first spacecraft beyond Earth orbit to be routinely tracked using lasers, which were located at NASA's Goddard Space Flight Center in Greenbelt, Maryland, and other facilities.

"The advantage of laser ranging is its accuracy, and that was apparent even in the earliest experiments," said John Degnan a former Goddard researcher who has been involved in satellite laser ranging since its earliest days. Degnan is now Chief Scientist at Sigma Space Corporation.

For Earth-orbiting satellites, laser ranging dates back to 1964, when the first successful experiments were conducted at the Goddard Optical Research Facility, now called the Goddard Geophysical and Astronomical Observatory. A team of scientists fired a ruby laser - still quite novel at the time - at the Explorer 22 spacecraft orbiting high in Earth's atmosphere.

The satellite, also known as Beacon Explorer B, was equipped with an array of reflectors designed specifically to send a laser signal back to the point of origin. The researchers measured a range of 600 miles (roughly 966 kilometers) to the spacecraft, with an accuracy up to about 10 feet (3 meters) - about 25 times better than the best microwave radars at the time could provide.

Laser ranging quickly became a standard technique. Throughout its 50-year history, it has been used to track more than 150 satellites and has ranged to five arrays of reflectors on the surface of the moon.

For laser ranging to LRO, laser pulses were transmitted by Goddard's Next Generation Satellite Laser Ranging System and other global stations. Pulses of green laser light traveled about 240,000 miles to be received by the spacecraft, moving at 3,600 miles per hour. These measurements were carried out with a range accuracy of about four inches (10 centimeters). (Radio telemetry was used to communicate the arrival time of the laser pulses from the spacecraft back to Earth.)

The high degree of accuracy provided by laser ranging makes it possible for LRO to carry out one of its primary mission goals: creating detailed maps of the topography, revealing the altitudes of features on the lunar surface.

To make these maps, the spacecraft's Lunar Orbiter Laser Altimeter (LOLA) sends 28 laser pulses per second to the lunar surface and determines how long it takes the return signals to come back. These round-trip times are converted into distance measurements, which are turned into topographic measurements when they are combined with information about the exact position of the spacecraft in its orbit.

LRO has already mapped more than six-and-a-half billion points on the lunar surface and provided measurements of the steepness of the ground's slope. The return signals received by the spacecraft also contain information about the roughness of the landscape.

"We know the shape and structure of the lunar surface better than we know any other object in the solar system, including Earth," said John Keller, LRO project scientist.

LRO tracking pulses also have been used to demonstrate Earth-to-satellite communication using lasers. In 2013, mission scientists reported the successful transmission of an image of the Mona Lisa pixel by pixel by laser pulses sent from Goddard to LRO.

Laser ranging has been tested at even greater distances. In May 2005, Goddard successfully exchanged laser pulses with the MESSENGER spacecraft en route to Mercury. The 15-million-mile (24.3-million-kilometer) distance to the spacecraft was measured with a precision of less than 8 inches (20 centimeters). Later that year, laser pulses transmitted from Earth were successfully detected by a Mars-orbiting spacecraft over a distance of 49.7 million miles (80 million kilometers).

Source: Moon Daily.
Link: http://www.moondaily.com/reports/Shooting_the_Moon_with_Satellite_Laser_Ranging_999.html.

Young Red Dwarf Stars could Host Habitable Worlds

by Johnny Bontemps for Astrobiology Magazine
Moffett Field CA (SPX)
Dec 22, 2014

Red dwarf stars, or M dwarfs, have recently been hailed as the best places to discover alien life. They are by far the most common stars in our galaxy, making up 75 percent of all stars. They are also the longest-lived-they can burn for trillions of years, far longer than the ten-billion-years lifespan of our Sun. What's more, nearly all of them may have a planet in the habitable zone.

But new research now adds important nuances to their story. In a new model, Lisa Kaltenegger and Ramses M. Ramirez at Cornell University in Ithaca, New York, took into account the habitable zone of younger red dwarf stars.

The habitable zone is the region around a star where water might remain liquid on the surface of a planet. For young stars, that region is located further away since they are bigger and brighter than full-grown stars.

"Our study adds new targets to the search for potential habitable worlds," Kaltenegger says. "So far no one has thought to look for these infant Earths."

But the study also calls into question the habitability of many previous candidates-namely, all the planets that are currently located in the habitable zone of the full-grown stars. These planets would spend too much time outside of the habitable zone during their formative years with, their water boiling away, and along with it their chance at life.

The paper will be published in the Jan. 1, 2015, issue of Astrophysical Journal Letters.

Young Hot Stars

New stars form when clouds of dust and gas collapse under their own gravity. As a large disk begins to swirl, a protostar begins to heat up and glow at the center, while surrounding matter clumps together to forms baby planets.

The long and stable adult phase of a star, or the so-called main sequence, begins when the star starts to fuse hydrogen atoms. The pre-main-sequence, or "teenage" years of a star, takes place when the star has acquired all of its mass but has not yet begun to burn hydrogen.

"Generally, we don't think of these young stars as interesting because for our Sun that period is relatively short," Kaltenegger says. "But red dwarfs can spend up to 2.5 billion years in the pre-main-sequence, potentially providing habitable conditions for nearly as long. On Earth, life appeared only within the first billion years."

These younger stars are actually larger and brighter than full-grown stars of the same mass. They are still shrinking under their own gravity, and this gravitational contraction heats up their core. For this reason, the habitable zone is wider and farther out.

"This opens interesting new possibilities," Kaltenegger says, "because these planets further out are easier to study. The next generation of telescopes, such as TESS, PLATO, ELT, and JWST, should have good enough resolutions to detect these planets and study their atmosphere."

As the star enters its adult phase and the habitable zone migrates inward, whatever life might have developed there could then move underground or underwater, the authors speculate.

Growing Up in the Dead Zone

For planets in the habitable zone of the full-grown stars, that's a different story. These planets would likely loose their water early on, as they would be on the inward side of the young star's habitable zone. These worlds would essentially spend their formative years with runaway greenhouse effects, much like Venus, and all water would boil away, leaving little chance for life.

Unless, perhaps, these planets are rehydrated later on. "Our own planet gained additional water after this early runaway phase from a late, heavy bombardment of water-rich asteroids," says Ramirez. "Planets at a distance corresponding to modern Earth or Venus orbiting these cool stars could be similarly replenished later on."

Another recent study, by Rodrigo Luger and Rory Barnes of the University of Washington, came to the same conclusion, though they put a stronger emphasis on the loss of water. Their paper will soon be published in the journal Astrobiology.

"The habitability of many planets around M dwarfs must be questioned," the authors wrote. "While next-generation space telescopes such as JWST may be capable of detecting certain biosignatures in these planets' atmospheres, such observations will be extremely costly and require extensive amounts of valuable telescope time," they added.

"Knowing in advance which planets are viable candidates for hosting life is therefore crucial, since it is possible that many planets in the habitable zone are not actually habitable for life as we know it."

"Mirage Earths"

Luger and Barnes also highlighted another important implication. In addition to loosing their water early on, planets in the habitable zone of the full-grown stars may end up with large amounts of oxygen in their atmosphere.

That oxygen, however, would not mean that there is life. Red dwarf stars emit a lot of radiation, which would split the water molecules into hydrogen and oxygen atoms. The lighter hydrogen atoms would be lost to space more easily, while the heavier oxygen atoms would remain behind.

In this case, oxygen would, in fact, be an anti-biosignature, and produce what the authors called "mirage Earths."

In the end, though, our knowledge about life and habitable worlds is still limited to one example-our own.

As Kaltenegger puts it: "In the search for planets like ours out there, we are certainly in for surprises. That's what makes this search so exciting."

Source: Space Daily.
Link: http://www.spacedaily.com/reports/Young_Red_Dwarf_Stars_could_Host_Habitable_Worlds_999.html.

New idea for transporting spacecraft could ease trip to Mars

by Brooks Hays
Princeton, N.J. (UPI)
Dec 22, 2014

Scientists say a new method, called ballistic capture, for transporting robotic rovers, satellites and astronaut-carrying spacecraft to Mars could save space agencies time and money.

Currently, the favored method for getting a spacecraft into orbit around Mars is the "Hohmann transfer." After rocketing through the Earth's atmosphere, the craft make a beeline for the Red Planet, barreling through space at high speeds. As it approaches Mars, its thrusters fire in the opposite direction -- slamming on the brakes and swinging the craft into orbit.

The Hohmann transfer is a highly effective move -- road-tested and reliable. But it is expensive and time specific. Launches are limited to a brief window when the orbit and rotation of Earth and Mars are just right.

Ballistic capture, on the other hand, would allow a more flexible launch window. It would also do away with the fuel-guzzling that Hohmann's high-speed braking requires. Instead of rocketing straight at Mars, a ballistic capture technique would see the spacecraft launched out ahead of Mars' orbital path. It would gradually slow and hold in place, waiting for Mars to swing by -- the Martian gravity pulling the craft into orbit as it approached.

"That's the magic of ballistic capture -- it's like flying in formation," Edward Belbruno, a visiting associated researcher at Princeton University, recently told Scientific American.

Belbruno, along with Francesco Topputo of the Polytechnic University of Milan, is responsible for a new paper on the subject of ballistic capture and its potential for enabling cheaper more frequent visits to Mars.

The study was published on arXiv, Cornell University's free science journal library, this week; it has also been submitted for formal publication to the journal Celestial Mechanics and Dynamical Astronomy.

As both Belbruno and Topputo are willing to admit, ballistic capture isn't perfect. It takes much longer than the typical six-month straight shot that has spit a number of Mars current orbiters into their paths around the Red Planet. Ballistic capture would also put a craft into a much higher orbit than most probes prefer for their scientific missions.

But the new study considers other options, too, including aerocapture, whereby a Hohmann transfer is tweaked to allow Mars' atmosphere to do some work in slowing down the craft's approach. That's why not as much fuel needs to be burned during the braking.

Ballistic capture may need some kinks worked out, but NASA is excited about its potential.

"It's an eye-opener," James Green, director of NASA's Planetary Science Division, told Scientific American. "This [ballistic capture technique] could not only apply here to the robotic end of it but also the human exploration end."

NASA has used the ballistic capture technique on one of its lunar missions -- the GRAIL mission in 2011. The European Space Agency also used the technique for its SMART-1 lunar mission in 2004.

Source: Mars Daily.
Link: http://www.marsdaily.com/reports/New_idea_for_transporting_spacecraft_could_ease_trip_to_Mars_999.html.

India Test-Fires Nuclear-Capable Missile

New Delhi, India (SPX)
Feb 20, 2015

India has successfully test-flown a nuclear-capable, surface-to-surface missile from a test range in the eastern state of Odisha.

The Prithvi-II missile was launched Thursday by personnel of the Strategic Forces Command (SFC) from a road mobile launcher at 9.15 am, The Hindu, an English-language daily newspaper, reports.

Around seven minutes later the missile splashed down near its designated target in the Bay of Bengal, according to Defense Research and Development Organization (DRDO) missile scientists.

"The surface-to-surface missile, which has a strike range of 350 km, was test-fired from the Integrated Test Range in Chandipur as part of a user trial by the Indian Army.

The test firing was successful," the sources said.

With a strike range of 350 km, Prithvi-II is capable of carrying 500 kg to 1,000 kg of warheads and is thrusted by a pair of liquid propulsion engines.

The last test-firing of the missile was held in November 2014 and was also successful, proving that the indigenous missile is now a proven technology, the sources said.

Source: Space War.
Link: http://www.spacewar.com/reports/India_Test_Fires_Nuclear_Capable_Missile_999.html.

India to build stealth frigates, nuclear subs

by Richard Tomkins
New Delhi (UPI)
Feb 19, 2015

The Indian government has reportedly given the nod for construction in the country of seven stealth frigates and a half-dozen nuclear-powered submarines.

According to The Times of India, the decision was made by the Cabinet committee on security and is in line with the "critical necessity" for India to bolster its overall deterrence capability.

The building projects will cost as much as $16.1 billion, the newspaper said.

Four of the frigates will be built at Mazagon Docks in Mumbai, while three will be built in Kolkata by Garden Reach Shipbuilders and Engineers.

The newspaper said multi-mission frigates will be larger, faster and stealthier than current Shivalik-class vessels and will feature additional weapons and sensors to operate in a multi-threat environment.

Construction of the vessels could take as long as 10 years.

Construction of the ballistic missile-carrying submarines will occur once Indian Navy requirements and specifications are drafted and agreed upon, the newspaper said...

Source: Space War.
Link: http://www.spacewar.com/reports/India_to_build_stealth_frigates_nuclear_subs_999.html.