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In astronomy or planetary science, the frost line, also known as the snow line or ice line, is the minimum distance from the central protostar of a solar nebula where the temperature is low enough for volatile compounds such as water, ammonia, methane, carbon dioxide and carbon monoxide to condense into solid grains, which will allow their accretion into planetesimals.
"Fermi and Frost" is a science fiction short story by American writer Frederik Pohl, first published in the January 1985 issue of Isaac Asimov's Science Fiction Magazine. It won the Hugo Award for Best Short Story in 1986.
The boundary of the region where ice could form in the early Solar System is known as the frost line (or snow line), and is located in the modern asteroid belt, between about 2.7 and 3.1 astronomical units (AU) from the Sun. [23] [24] It is therefore necessary that objects forming beyond the frost line–such as comets, trans-Neptunian objects ...
In writing this poem, Frost was inspired by his childhood experience with swinging on birches, which was a popular game for children in rural areas of New England during the time. Frost's own children were avid "birch swingers", as demonstrated by a selection from his daughter Lesley's journal: "On the way home, i climbed up a high birch and ...
Thus, the Sun occupies 0.00001% (1 part in 10 7) of the volume of a sphere with a radius the size of Earth's orbit, whereas Earth's volume is roughly 1 millionth (10 −6) that of the Sun. Jupiter, the largest planet, is 5.2 AU from the Sun and has a radius of 71,000 km (0.00047 AU; 44,000 mi), whereas the most distant planet, Neptune, is 30 AU ...
Planetesimals beyond the frost line accumulated up to 4 M E within about 3 million years. [38] Today, the four giant planets comprise just under 99% of all the mass orbiting the Sun. [b] Theorists believe it is no accident that Jupiter lies just beyond the frost line. Because the frost line accumulated large amounts of water via evaporation ...
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I love that line in the poem, and it was a metaphor for my story, about taking a cup full of fire from the sun." [1] The Golden Apples of the Sun was Bradbury's third published collection of short stories. [3] The first, Dark Carnival, was published by Arkham House in 1947; the second, The Illustrated Man, was published by Doubleday & Company ...