Many comets are believed to be largely composed of water ice, with some other amounts of silicate (rocky) components, fragments or dust - such that they earned the nickname "dirty snowballs."
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Comets are objects in the solar system that are primarily made of ice, along with rock and dust. As comets approach the sun, the heat causes their ice to vaporize and form a glowing coma and tail.
hydrogen and helium
hydrogen and helium
hydrogen and helium
the solar system is made by ALLAH (S.W.t) he maade it !!
No satellite has left our solar system. The farthest human-made object from Earth is the Voyager 1 spacecraft, which has entered interstellar space but is still within the boundary of our solar system.