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
Some asteroids have other asteroids orbiting them.
131
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
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The population of the Earth has more than doubled since 1950.
151
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147