The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
It would take more than 150 years to drive a car to the sun.
569
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
There are two golf balls sitting on the moon.
721
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175