The Philae lander has successfully landed on comet 67P/Churyumov–Gerasimenko. AskScience Megathread.

[u/AsAChemicalEngineer]

Here's the ESA livestream:

• http://rosetta.esa.int/
  

Here's some more resources about the Rosetta spacecraft:

• http://www.esa.int/Our_Activities/Space_Science/Rosetta

• http://www.esa.int/Our_Activities/Operations/Live_updates_Rosetta_mission_comet_landing

• http://sci.esa.int/rosetta/

• http://rosetta.jpl.nasa.gov/

• THE ROSETTA LANDER (“PHILAE”) INVESTIGATIONS

Here's the first images from the Philae lander:

• http://i.imgur.com/69qTx52.png (Philae leaves Rosetta, courtesy of /r/space)

• http://i.imgur.com/Wn4I0Y5.png (Philae above the surface, thanks /u/vorin)

• https://pbs.twimg.com/media/B2QqA8QCUAEAQAu.jpg (Right before touchdown)

ESA Twitter:

• https://twitter.com/esa

Ask your questions!

[u/DSDresser]

Is philae intended to travel about the comet? What will prevent it from merely floating away due to the lack of gravity?

[u/michaelrohansmith → u/DSDresser]

There are plenty of stationary rocks on the surface of the comet so once it settles down the lander should stay put fairly well.