On July 20, 1969, Apollo 11 astronaut Neil Armstrong announced his historic arrival on the ancient lava plain of Mare Tranquillitatis with the following message to NASA: "Houston, Tranquility Base ...
July 20th is Moon Day, Space Exploration Day and the anniversary of the first Apollo 11 moonwalk. Here’s a look at the Apollo program and the new Artemis program to return to the lunar surface.