From satellites to the moon, NASA has conducted dozens of successful missions to space. These are some of the most famous. We'll start with a look at NASA's first space station.
In 1964, police officer Lonnie Zamora saw an egg-shaped UFO in Socorro, New Mexico -- and the pilots. The encounter was so incredible that government nvestigators from the secret Project Blue Book even came to investigate.
Thousands of satellites fly overhead every day, helping us with things like weather forecasts, scientific research, communications, TV broadcasts (and maybe some surreptitious spying). How much do you know about these eyes in the sky?