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
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14