Mars had an oxygen-rich atmosphere around 4 billion years ago
13
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Astronauts cannot burp in space.
232
Pluto is smaller than Russia.
9
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
If two pieces of metal touch in space, they become permanently stuck together.
808
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Only 55% of Americans know that the sun is a star.
986