A 100-pound person on Earth would weigh 38 pounds on Mars.
102
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
It takes eight and a half minutes for light to get from the sun to earth.
159
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Venus is the only planet that rotates clockwise.
310
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16