MOSCOW (AP) — A Russian space probe designed to boost the nation’s pride on a bold mission to a moon of Mars came down in flames Sunday, showering fragments into the south Pacific west of Chile’s coast, officials said.
Pieces from the Phobos-Grunt, which had become stuck in Earth’s orbit, landed in water 775 miles west of Wellington Island in Chile’s south, the Russian military’s Air and Space Defense Forces said in a statement carried by the country’s news agencies.
The military space tracking facilities were monitoring the probe’s crash, its spokesman, Col. Alexei Zolotukhin, said. Col. Zolotukhin said the deserted ocean area is where Russia guides its discarded space cargo ships serving the International Space Station.
The RIA Novosti news agency, however, cited Russian ballistic experts who said the fragments fell over a broader patch of Earth’s surface, spreading from the Atlantic and including the territory of Brazil. It said the midpoint of the crash zone was located in the Brazilian state of Goias.
The $170 million craft was one of the heaviest and most toxic pieces of space junk ever to crash to earth, but space officials and experts said the risks posed by its crash were minimal because the toxic rocket fuel on board and most of the craft’s structure would burn up in the atmosphere high above the ground anyway.
The Phobos-Grunt (“grunt” is Russian for “ground”) was designed to travel to one of Mars’ twin moons, Phobos, land on it, collect soil samples and fly them back to Earth in 2014 in one of the most daunting interplanetary missions ever. It got stranded in Earth’s orbit after its Nov. 9 launch, and efforts by Russian and European Space Agency experts to bring it back to life failed.
“This one is way, way down in the ranking,” he said in a telephone interview from his office in Berlin, adding that booster rockets contain more solid segments that may survive fiery re-entries.
Thousands of pieces of derelict space vehicles orbit Earth, occasionally posing danger to astronauts and satellites in orbit, but as far as is known, no one ever has been hurt by falling space debris.
Mr. Klinkrad agreed with that assessment, adding that about 100 metric tons (110 tons) of space junk fall to earth every year. “This is 200 kilograms out of these 100 tons,” he said.
The Phobos-Grunt weighed 14.9 tons, including a load of 12 tons of highly toxic rocket fuel intended for the long journey to the Martian moon of Phobos and left unused as the probe got stranded in orbit around Earth.
Roscosmos said that all of the fuel would burn up on re-entry, a forecast Mr. Klinkrad said was supported by calculations done by NASA and the ESA. He said the craft’s tanks were made of aluminum alloy that had a very low melting temperature, and they would burst at an altitude of more than 60 miles.
The space era has seen far larger spacecraft crash. NASA’s Skylab space station, which went down in 1979, weighed 85 tons, and Russia’s Mir space station, which de-orbited in 2001, weighed about 143 tons. Their descent fueled fears around the world, but the wreckage of both fell far away from populated areas.
The Phobos-Grunt was Russia’s most expensive and the most ambitious space mission since Soviet times. Its mission to the crater-dented, potato-shaped Martian moon was to give scientists precious materials that could shed more light on the genesis of the solar system.View Entire Story
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