The Philae's descent onto the comet. (@ObservingSpace/Twitter)

Philae is the European Space Agency (ESA)'s probe, which landed on the surface of a comet at about 8 a.m. PST Wednesday morning. 

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"This is a big step for human civilization. The biggest problem with success is it looks easy," said ESA director Jean-Jacques Dordain.

Tweets from the Philae's official Twitter account were posted shortly after the landing.

Social media erupted once news broke out about the Philae landing and users shared their thoughts: 

Read more about the landing at New York Times or BBC News. 

Reach Supervising Executive Producer Shilpa Nagesh here. Follow her on Twitter here.