The ESA put a lander on a comet late last fall … and it died within a couple of days.
The lander, called Philae, was solar powered. It bounced quite a bit on landing, and its handlers assumed it had landed in the shade. It was programmed to shut down if it didn’t have enough power, and to reboot if power started flowing again.
They’d always hoped that, as the comet approached the sun, that eventually Philae would get enough sunshine to wake up and phone home.
Guess what? Philae contacted Earth about 22 hours ago, and said it’s doing fine! It’s collecting new data, and it’s got data stored up that it’s ready to start sending.