It 'snows' metal on Venus.
13
The light hitting the earth right now is 30 thousand years old.
163
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Jupiter is bigger than all the other planets combined.
254
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
More than 20 million meteoroids enter Earth's atmosphere every day.
139
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14