Photo courtesy: NASA

On July 16, 1969, NASA’s Apollo 11 spacecraft launched from Cape Kennedy at 13:32:00 UT, reaching the moon four days later.

On July 20, Neil Armstrong and Buzz Aldrin stepped onto the lunar surface, marking the first time humans set foot on another planetary body.

NASA is commemorating the Apollo 11 mission with several events, including special programming which can be streamed online as well as a series of exhibits scattered across the U.S.

People have also been celebrating on Twitter, using the hashtag #Apollo50th.

Here are some of the tributes making news online.

UBC Astrophysics student Steffani Grondin started a viral Twitter thread showcasing the talented women scientists and engineers who played an instrumental role in the success of Apollo 11:

Here’s Buzz Aldrin weighing in on the historic milestone:

On Tuesday, a full-sized, Saturn V rocket was projected onto the Washington Monument.

And here are some awe-inspiring photos, video and never-before-seen footage from NASA:

Watch NASA salute the heroes who made Apollo 11 possible here: