Venus is the only planet that rotates clockwise.
310
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
Summer on Uranus lasts for 21 years.
358
Lightning strikes about 6,000 times per minute on this planet!
158
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
It takes eight and a half minutes for light to get from the sun to earth.
159
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
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