The last person on the moon was Eugene Cernan. He and fellow explorer Harrison Schmidt left the moon at 5:40 A.M. GMT, December 13th, 1972. No humans have visited the moon since then.
Over one million Earths can fit on the sun.
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
The largest canyon system in the Solar System is Valles Marineris on Mars. It is more than 3000 miles long and so would stretch from California to New York. In some places it reaches 3 miles in depth and 200 miles in width.
Venus is the brightest natural object in the sky besides the Sun and Moon. It can be as much as 15 times brighter than the brightest star (Sirius).
Pioneer 11's speed going past Jupiter was over 107,000 mph, the fastest speed ever traveled by a human-made object.
A Space Shuttle and its boosters ready for launch are the same height as the Statue of Liberty but weigh almost three times as much.
The Sun looks 1600 times fainter from Pluto than it does from the Earth.
The elements Carbon, Hydrogen, Oxygen, and Nitrogen - all crucial to life - are found in roughly the same proportions in comets and human beings.
