The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The earth rotates more slowly on its axis in March than in September.
145
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
It would take more than 150 years to drive a car to the sun.
569
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219