Scientists Lose Connection With Comet Lander Philae, But The Mission's Still A Huge Success

DARMSTADT, GERMANY - NOVEMBER 12: (EDITORIAL USE ONLY) In this February 17, 2014 handout photo illustration provided by the European Space Agency (ESA) the Philae lander is pictured descending onto the 67P/Churyumov-Gerasimenko comet. ESA will attempt to land the Philae lander onto the comet in the afternoon (GMT) of November 12 which, if successful, will be the first time ever that a man-made craft has landed onto a comet. The Philae lander, launched from the Rosetta probe, is a mini laboratory that will harpoon itself to the surface, though a problem with a gas thruster detected November 11 is making the outcome of the landing uncertain. (Photo ESA via Getty Images)
Source: ESA/Getty Images News/Getty Images

Earlier this week, the world watched with bated breath as the European Space Agency (ESA) made history by landing its fridge-sized craft, Philae, on a comet. Over the last two days, data and breathtaking photos from the 67P/Churyumov-Gerasimenko comet have made it back to us on earth thanks to Philae, taking us all to a place that has never been possible before. Sadly, though, that may be over, at least for now: on Saturday, scientists lost contact with Philae after its battery died.  

It’s not that the mission is now disastrously over, but the issue is this: Philae is solar-powered, and needs 6-7 hours of sunlight in order to charge its batteries. But when it landed on Wednesday, it settled next to a cliff that's been mostly hidden from the sun — so it's been getting about an hour and a half of sunlight per comet day. Which just hasn't been enough. Tragically, when the ESA tried to establish communication with the lander on Saturday morning, they got no signals. 

"Philae has fallen into 'idle mode' for a potentially long silence. In this mode, all instruments and most systems on board are shut down," the ESA said, according to CNN.

[Twitter Embed: https://twitter.com/Philae2014/statuses/533419281783214080]

On Friday, the ESA tried to fix the problem by attempting to rotate the craft and thus pull it out of that particular piece of shadow, with its solar panels towards the sunlight. Still, even it manages to position itself correctly, it's not a quick fix — it could be months before the batteries are charged up again. Writes the ESA on its blog: 

Mission controllers sent commands to rotate the lander's main body, to which the solar panels are fixed. This may have exposed more panel area to sunlight.

But ESA's head of mission operations, Paolo Ferri, told the AP that, "We don't know if the charge will ever be high enough to operate the lander again."

Still, luckily, the scientists were able to download most of the lander's data before it went to sleep. And though Philae was supposed to keep sending home data for the next nine months, what the little craft has done already is inconceivably impressive, the result of 10 years of hard work. In fact, the awesome craft managed to achieve almost 100 percent of its primary goals. And as flight director Andrea Accomazzo told USA Today:

Let's stop looking at things that we could have done if everything had worked properly. Let us look at things that we have done, what we have achieved and what we have on the ground. This is unique and will be unique forever.
Words to remember —and not only if you're in the space industry.

Images: Getty Images (3)

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