Evolution of Neptune's atmosphere, page 5
On this scale you can see that the "rocky" materials such as Calcium, Magnesium, Iron, Nickel, and Lead, that the terrestrial planets are made of can condense out of a very hot nebula, but ice will not condense unless the temperature is very low.
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If you had a quiz question in school that asked what year Neptune was discovered, you'd probably choose 1846. But Neptune wasn't discovered the way all the other planets in our solar system were. Astronomers...more
The picture shows places on Jupiter which are hot. Jupiter is a very warm body in space, as shown in the picture, and this warmth is associated with the energy of Jupiter. Neptune has also been found to...more