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The Moon has no atmosphere at all. It is not able to retain an atmosphere due to its weak gravity, which allows gases to escape into space. This lack of atmosphere is one reason why the Moon's surface experiences extreme temperature variations.
In the atmosphere, some of the sun's rays get absorbed or reflected in all directions.
Earth's gravity is what holds all the gases in the atmosphere around the planet. Gravity exerts a force that prevents the gases from escaping into space, creating the atmosphere that surrounds the Earth.
The atmosphere surrounds Earth and is made up of all the air around us.
The Earth's atmosphere consists of all the gases that surround the planet, such as nitrogen, oxygen, carbon dioxide, and others.
The troposphere holds almost all of the water vapor in the atmosphere as well as approximately 75-80% of the total mass of the atmosphere.