Summer on Uranus lasts for 21 years.
358
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
41% of the moon is not visible from earth at any time.
103
The earth travels through space at 660,000 miles per hour.
189
Sound doesn't travel in space.
255