Why is the moons atmosphere so small?
The moon’s mass is significantly lower than that of Earth, due to a difference in density. Plus, the moon doesn’t have a strong magnetic field like we do on earth, which plays an important role in creating a stable atmosphere. Temperature, historical events (impacts and whatnot), and the types of compounds present on a celestial object also influence atmosphere. It takes a variety of factors to create a stable atmosphere, many of which are absent in the moon and its history.
