What is the frost line in the solar nebula? Explain how temperature differences led to the formation of two distinct types of planets.
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What is the frost line in the solar nebula? Explain how temperature differences led to the formation of two distinct types of planets.
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- What is an exoplanet? Group of answer choices A planet in our solar system beyond Pluto. Any planet with extra-terrestrial life. A planet in an extra-solar star system outside of our solar system. Objects in the solar system such as Pluto that were once considered planets but no longer are.Why do we think that planets in our Solar System were not formed out of the gaseous disk by direct gravitational collapse? Planets are formed in disks. Disks rotate too fast to collapse gravitationally to form planets. In disks that are not massive enough, tidal gravity of the central star prevents the disk gas from collapsing. The material in the disk orbits close to the star. This makes the disk too hot, and pressure support prevented the disk from gravitational collapse. The gravity of the forming planets was not enough to accrete gas.Please list and describe the main differences between a planet and a dwarf planet. Why was Pluto re-classified from planets into dwarf planets?
- Imagine that you visit a planet orbiting another star and discover that it is heavily cratered, but its small moon is nearly crater free. Why would that be a surprise? Speculate what might have happened to those objects.Which of the following could the Close Encounter hypothesis NOT explain A)The planets all orbit in the same place B) The planets all orbit in the same direction C) Terrestrial planets do not have the same composition as the Sun D) All of these#8