There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
There are two golf balls sitting on the moon.
721
The earth is .02 degrees hotter during a full moon.
157
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178