The Philae lander (about the size of a washing machine) launched into space—attached to the Rosetta space probe—10 years ago. This week, it landed on Comet C-G, over more than 300 million miles away. The lander actually bounced off the comet, which has super-weak gravity, three times before settling there. After a decade getting there, Philae is now responsible for teaching us on Earth more about our home planet, as well as comets—like those it landed on. We can keep track of the (seemingly very cheerful) robot by following its progress on Twitter.