Earlier this week, NASA uploaded an incredible treasure trove of images to a new gallery on Flickr: unprocessed photographs from all of the manned Apollo missions. They represent an incredible look into what the astronauts saw on their missions to the moon.
Here's a freshly-updated infographic by SPACE.com's Karl Tate, illustrating the distances driven by various rovers on the Moon and Mars.
The equivalence principle is one of the fundamental concepts behind gravitational theory and general relativity, and holds that gravity exerts the same force on objects of different mass.
Back in 1969, the Apollo 11 mission put mankind on the moon. It was a massive accomplishment. Two years later, though, people were getting bored. 40 years ago today, it become the moon buggy's job to make space fun again.