The earth rotates more slowly on its axis in March than in September.
145
Jupiter is bigger than all the other planets combined.
254
Sound doesn't travel in space.
255
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
There are two golf balls sitting on the moon.
721
Summer on Uranus lasts for 21 years.
358
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147