Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Venus is the only planet that rotates clockwise.
310
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
The population of the Earth has more than doubled since 1950.
151
Some asteroids have other asteroids orbiting them.
131
Lightning strikes about 6,000 times per minute on this planet!
158