A comet's tail always points away from the sun.
2
NASA invented baby food as we know it today.
7
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Sound doesn't travel in space.
255
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12