Space agency ends attempt to contact Russian probe (AP)

MOSCOW – The European Space Agency said Friday it has abandoned efforts to contact a rogue Russian space probe, increasing the likelihood it will plunge to Earth.

The unmanned Phobos-Ground probe was to head to the Mars moon of Phobos on a 2 1/2-year mission to take soil samples and fly them back to Earth. But the probe became stuck in Earth orbit after its Nov. 9 launch and attempts to send commands that could propel it toward the Mars moon have been unsuccessful.

ESA said in a statement that although the agency has halted efforts to contact the probe, it will resume if any changes are reported by the Russian space agency.

A spokesman for the Paris-based ESA told The Associated Press that Russia was going to continue to try to contract the probe over the weekend; he spoke on condition he not be named. Russian space officials could not be reached for comment late Friday.

Russian deputy space chief Vitaly Davydov said last month that if the spacecraft is not sent to Mars, it could fall to Earth sometime between late December and late February.

The failed spacecraft is 13.2 metric tons (14.6 tons); most of that weight, about 11 metric tons (12 tons), is highly toxic fuel. Experts say that if the fuel has frozen, some could survive the plummet to Earth, but that if it is liquid it will likely combust from the heat of re-entering the atmosphere.

The mission was planned to reach Mars orbit next September and land on Phobos in February 2013.

Scientists hoped that studies of the Phobos soil would help solve the mystery of its origin and shed more light on the genesis of the solar system. Some believe that the crater-dented moon is an asteroid captured by Mars' gravity, while others think it's a piece of debris resulting from Mars' collision with another celestial object.

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Online:

ESA website http://us.rd.yahoo.com/dailynews/ap/ap_on_re_eu/storytext/eu_russia_mars_mission/43786367/SIG=10k9t67oj/*http://www.esa.int

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Associated Press writer Sarah DiLorenzo contributed to this story from Paris.

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Military loses contact with hypersonic test plane

DARPA’s (Defense Advanced Research Projects Agency) Falcon Hypersonic Technology Vehicle 2 (HTV-2) is shown in this undated artist's conception, released August 11, 2011.

Credit: Reuters/DARPA/Handout

WASHINGTON | Thu Aug 11, 2011 3:22pm EDT

WASHINGTON (Reuters) - An unmanned experimental aircraft designed to glide down from the upper atmosphere at 20 times the speed of sound lost contact with ground control on its second test flight on Thursday, a Pentagon agency said.

The Falcon HTV-2 was launched from Vandenberg Air Force Base in California on a rocket and successfully separated from the launch vehicle, the Defense Advanced Research Projects Agency said.

The arrowhead-shaped plane was expected to separate from the rocket near the peak of its ascent and glide back to earth, reaching hypersonic speed before rolling and plunging into the Pacific ocean, according to a test diagram posted online.

About 10 minutes after the flight began, DARPA tweeted that the mission was "on track, entering glide phase." But about 26 minutes later, DARPA tweeted that its monitoring stations had lost contact with the glider.

"Downrange assets did not reacquire tracking or telemetry," DARPA tweeted about an hour later. "HTV-2 has an autonomous flight termination capacity."

The loss of communications in the final stages of the test flight was a failure for the agency. During the initial flight test in April, researchers lost contact with the vehicle about nine minutes into the flight.

The Falcon HTV-2 glider is part of the Defense Department's effort to build what it calls a "prompt global strike" capability that would enable it to hit targets worldwide within an hour with conventional or nuclear warheads.

(Reporting by David Alexander; Editing by Anthony Boadle)

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