Only 843 pounds of moon rocks exist on Earth, according to NASA.
Now, 30 years after it went missing, one of those precious rocks has been found among memorabilia belonging to former President Bill Clinton.
Miami (CNN) - A satellite whose orbit is degrading will fall back to Earth Friday afternoon, but only some of its pieces will survive the fiery ride through the atmosphere, NASA scientists said Thursday.
The pieces are not expected to come down over North America, scientists said, but where they'll likely land is something NASA expects to narrow down over the next 24 hours.
With the internet, it doesn’t take a Ph.D. in astrophysics to help find new worlds outside our solar system.
For the first time, new planet candidates have been identified with the help of the public’s analysis of NASA data. Anyone can join this effort, called Planet Hunters, for free and start helping real astronomers weed through data that might signal a never-before-seen planet.