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Our Home Planet
Earth is an ocean planet. Our home world's abundance of water -- and life -- makes it unique in our solar system. Other planets, plus a few moons, have ice, atmospheres, seasons and even weather, but only on Earth does the whole complicated mix come together in a way that encourages life -- and lots of it.

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  News Features People Extreme Facts Dictionary

 
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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).