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Blue gas giant planets and bright yellow stars float in a dark, starry cosmic background.

Blue gas giant planets and bright yellow stars float in a dark, starry cosmic background.
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Hypothesis: Most mini-Neptunes within 100 days are rock with H/He dominated atmospheres for solar type stars Alternative hypothesis: A significant fraction of their bulk mass is water Test Occurrence as a function of radius and equilibrium temperature Note that Teq(age, Fstar) Find a sample of at least 100 young stars (106-107 years) and 100 old stars (109 -1010 years) Calculate occurrence rate of planets with radii between 2 and 3 earth radii If the scale height of the atmosphere time dependent, then this would indicate H/He dominated atmospheres See more

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