One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The heart of an astronaut actually gets smaller when in outer space.
216
The earth rotates more slowly on its axis in March than in September.
145
It would take more than 150 years to drive a car to the sun.
569
Summer on Uranus lasts for 21 years.
358