Sound doesn't travel in space.
255
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
It 'snows' metal on Venus.
13
Lightning strikes about 6,000 times per minute on this planet!
158
Astronauts get taller when they are in space.
224
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221