Why do comets have so much water?

Question

Why do comets have so much water?

Answer 1

Hydrogen is a common element in the universe. So is oxygen. When they combine they form water.

Answer 2

http://www.creationscience.com/onlineboo...

Answer 3

Becuase they are made of ice. Which is frozen water.

Answer 4

just a combination of flying through vast distances of deep space and the extremely cold tempatures...

water molecules/vapor floats around out there, as the comet flies through deep space, ti collects this vapor, and adds it to it's own mass... as it gets closer to the sun, the comet starts to evaporate, leaving it's distintive tail.

Answer 5

not water, ice

comets are huge balls of ice and dust.

mostly ice

theyre called the "snowballs" of space sometimes.

i wouldnt think that the temperatures of comets would be able to provide water since theyre in the outer solar system.

=]

Answer 6

Hydrogen loves to combine with a lot of things. The only hydrogen we see no combined with another element is H2, two hydrogens bonded together. Oxygen works very well for bonding with Hydrogen so whenever Hydrogen and Oxygen are in the same place at the same time they form H20, water.

Comets have so much water because having water is part of the criteria of being a comet... or at least having some other form of ice like frozen carbon dioxide. If it didn't have ice than there would be nothing to vaporize when the comet got close to the sun and there would be no comet tail... the defining characteristic of comets.