Archive: 12/17/2010

Earth's final growth spurt

What led to water on the interior of the Moon or the formation of the Borealis basin that covers 40 percent of the surface of Mars? And what caused at least some of Earth’s tilt — without which there ...

Dec 17, 2010 4.7 / 5 (9) 0

Visiting an asteroid

Asteroids (or comets) whose orbits bring them close to the earth's orbit are called Near Earth Objects (NEOs). Some asteroids are old, dating from the origins of the solar system about four and one-half billion ...

Dec 17, 2010 4.5 / 5 (2) 6