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Ancient Space Rubble
Asteroids are rocky fragments left over from the formation our the solar system about 4.6 billion years ago. Most of these chunks of space rubble, sometimes called minor planets, can be found orbiting the Sun in a belt between the orbits of Mars and Jupiter. The Asteroid Belt or Main Belt probably contains millions of asteroids.

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Q
bar

= 0.987 atmosphere = 1.02 kg/cm^2 = 100 kilopascal = 14.5 lbs/square inch.

billion

1,000,000,000

biodiversity

The variety and variability among living organisms and the ecological complexes in which they occur.

bolide

a very bright meteor (or fireball) that produces a sonic boom.

bright terrain

A type of surface on Ganymede which is lighter than other regions on this moon which is often associated with grooves (see also dark terrain).

 
Can't find it? Don't understand it? Ask us.
Q
bar

= 0.987 atmosphere = 1.02 kg/cm^2 = 100 kilopascal = 14.5 lbs/square inch.

billion

1,000,000,000

biodiversity

The variety and variability among living organisms and the ecological complexes in which they occur.

bolide

a very bright meteor (or fireball) that produces a sonic boom.

bright terrain

A type of surface on Ganymede which is lighter than other regions on this moon which is often associated with grooves (see also dark terrain).