In the context of the formation of planets in the solar nebula, the frost line marks the distance from the sun beyond which planets could be cold enough to have snow hydrogen compounds were particularly abundant the temperature was low enough for hydrogen compounds to condense into ices the temperature was low enough for solid rock to condense from the gas.

the temperature was low enough for hydrogen compounds to condense into ices

Explanation:

A solar nebula is made up of a cloud or accumulation of gaseous substances and dust from which planetary bodies in the solar system such as the sun and planets are formed.

Frost line can be defined as a shape in the form of a circle which is at a specific distance from the Sun, beyond which the temperature was low enough for compounds of hydrogen to condense into ice.

The frost line can be found between the planet Mars and Jupiter.

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