The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The earth travels through space at 660,000 miles per hour.
189
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The earth rotates more slowly on its axis in March than in September.
145
The heart of an astronaut actually gets smaller when in outer space.
216