None of the above things are alive or have personalities.
Except on Twitter, of course, where they are being absolutely adorable to each other.
Here are the highlights of these two pals and their last goodbye half a billion kilometres from Earth.
Phew! Back in contact with Earth after separation. #CometLanding— ESA Rosetta Mission (@ESA_Rosetta) November 12, 2014
Finally! I’m stretching my legs after more than 10 years. Landing gear deployed! #CometLanding— Philae Lander (@Philae2014) November 12, 2014
.@philae2014’s first postcard just after separation – it’s of me!
Credit: ESA/Rosetta/Philae/CIVA pic.twitter.com/OXJwGunL3V— ESA Rosetta Mission (@ESA_Rosetta) November 12, 2014
Oh, and yes, the Mars Rover Curiosity is also getting in on the fun:
#COMETLANDING: Full Coverage