Answer to Question 1
Airless bodies develop where solar heating is strong and/or gravities are weak. Simply stated, small warm bodies have a better chance of losing their atmospheres because gas molecules are more energetic and need less speed to escape their weak gravities.
Answer to Question 2
The Moon originated from the impact of a large planetary body colliding with early Earth and tearing out a large chunk of molten Earth material that cooled within orbiting range and was kept within orbiting range by gravity.
Urinometer. In this procedure, a urine sample and urinometer are placed within a tube, and the liqui
Evolution of the Sun's luminosity, radius and effective temperature compared to the present Sun
The Sun and the Planets
The primate skull is generalized compared to many other mammals.
Liquid Water Properties compared with n-pentane, nonpolar, non-hydrogen bonding liquid
Orbits of the Planets