Philae falls silent as batteries on lander fade
Print Edition
THE European Space Agency received no signals from the Philae lander yesterday during a scheduled effort to establish communication.
Paolo Ferri, ESA’s head of mission operations, said the Rosetta orbiter did not get any signals from the lander on comet 67P/Churyumov-Gerasimenko.
On Friday, ESA ordered a rotating operation to pull the lander out of a shadow so solar panels could recharge its batteries.
Even if that operation is successful, it may take days or weeks until the batteries are strong enough to send signals again.
“We don’t know if the charge will ever be high enough to operate the lander again,” Ferri said. “It is highly unlikely that we will establish any kind of communication any time soon, but nevertheless the orbiter will continue to listen for possible signals.”
On Wednesday, Philae landed next to a cliff that largely blocked sunlight from reaching its solar panels.
The historic landing was the culmination of a 10-year journey aboard the Rosetta space probe. Since alighting on the comet, some 500 million kilometers from Earth, the lander has performed a series of tests and sent back reams of data, including photos.
On Friday, the spacecraft was given commands to rotate itself to catch more sunlight and to drill a hole into the comet. ESA announced — prematurely, it turned out — that the hole had been drilled 25 centimeters into the comet’s surface
“We know that all the movements of the operation were performed and all the data was sent down,” Ferri said yesterday. “However, at this point we do not even know if it really succeeded and if it (the drill) even touched the ground during the drilling operation.”
Material beneath the surface of the comet has remained almost unchanged for 4.5 billion years, so the samples would be a cosmic time capsule scientists are eager to study.
Scientists hope the US$1.6 billion project will help answer questions about the origins of the universe and life on Earth.
One of the things they are most excited about is the possibility the mission might help confirm that comets brought the building blocks of life — organic matter and water — to Earth.
They already know that comets contain amino acids, a key component of cells.
Finding the right kind of amino acids and water would be an important hint that life on Earth came from space.
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