In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Pluto is smaller than Russia.
9
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The light hitting the earth right now is 30 thousand years old.
163
A comet's tail always points away from the sun.
2