Atmosphere | Definition, Layers, & Facts | Britannica
2025年1月6日 · Atmosphere, the gas and aerosol envelope that extends from the ocean, land, and ice-covered surface of a planet outward into space. The density of the atmosphere …
Atmosphere - Wikipedia
An atmosphere (from Ancient Greek ἀτμός (atmós) 'vapour, steam' and σφαῖρα (sphaîra) 'sphere') [1] is a layer of gases that envelop an astronomical object, held in place by the gravity of the …
Atmosphere of Earth - Wikipedia
The atmosphere of Earth is composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans), known collectively as air, with variable quantities of …
What Is the Atmosphere? - Center for Science Education
The atmosphere is a mixture of gases that surrounds the Earth. It helps make life possible by providing us with air to breathe, shielding us from harmful ultraviolet (UV) radiation coming …
What Is... Earth's Atmosphere? - NASA
2024年5月13日 · “The Earth’s atmosphere allows life to exist. . . like a protective bubble that surrounds the planet,” stated Ueyama. Although we cannot directly see the atmosphere, it …
Atmosphere - Definition, Layers of Atmosphere, Composition of ...
An atmosphere is a blanket of gases that surrounds Earth. It is held near the surface of the planet by Earth’s gravitational attraction. Argon, oxygen and nitrogen from the three main …
Atmosphere: Definition, Structure, Layers, and Composition
2024年2月6日 · Atmosphere is the layer of gases that surrounds a planet. It is the protective layer of Earth and protects from the harmful UV rays of the sun. This article will cover an …
Layers of the Atmosphere - National Oceanic and Atmospheric Administration
2024年8月20日 · Each of the layers are bounded by "pauses" where the greatest changes in thermal characteristics, chemical composition, movement, and density occur. This is the …
The Atmosphere | National Oceanic and Atmospheric Administration
2024年7月2日 · The atmosphere surrounds the Earth and holds the air we breathe; it protects us from outer space; and holds moisture (clouds), gases, and tiny particles. In short, the …
Earth - Atmosphere, Climate, Ozone | Britannica
2 天之前 · The composition of the atmosphere is more or less constant with height to an altitude of about 100 km (60 miles), with particular exceptions being water vapour and ozone. The …