1. Frost line (astrophysics)In astronomy or planetary science, the frost line, also known as the snow line or ice line, refers to a particular distance in the solar nebula from the central protosun where it is cool enough for hydrogen compounds such as water, ammonia, and methane to condense into solid ice grains. Depending on density, that temperature is estimated to be about 150K. The frost line of the Solar System is around 2.7 AU, near the middle of the asteroid belt.
Read “Frost line (astrophysics)” on English Wikipedia
Read “凍結線” on Japanese Wikipedia
Read “Frost line (astrophysics)” on DBpedia
Read “Frost line (astrophysics)” on English Wikipedia
Read “凍結線” on Japanese Wikipedia
Read “Frost line (astrophysics)” on DBpedia
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