Earth & Exosphere - Unionpedia, the concept map

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Difference between Earth and Exosphere

Earth vs. Exosphere

Earth is the third planet from the Sun and the only astronomical object known to harbor life. The exosphere (ἔξω éxō "outside, external, beyond", σφαῖρα sphaĩra "sphere") is a thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body, but where the density is so low that the molecules are essentially collision-less.

Allotropes of oxygen

There are several known allotropes of oxygen.

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Atmosphere of Earth

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 suspended aerosols and particulates (which create weather features such as clouds and hazes), all retained by Earth's gravity.

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Calcium

Calcium is a chemical element; it has symbol Ca and atomic number 20.

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Carbon dioxide

Carbon dioxide is a chemical compound with the chemical formula.

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Helium

Helium (from lit) is a chemical element; it has symbol He and atomic number 2.

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Hydrogen

Hydrogen is a chemical element; it has symbol H and atomic number 1.

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Magnetosphere

In astronomy and planetary science, a magnetosphere is a region of space surrounding an astronomical object in which charged particles are affected by that object's magnetic field.

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Moon

The Moon is Earth's only natural satellite.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the U.S. federal government responsible for the civil space program, aeronautics research, and space research.

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Natural satellite

A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite).

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Orbit

In celestial mechanics, an orbit (also known as orbital revolution) is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as a planet, moon, asteroid, or Lagrange point.

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Outer space

Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies.

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Planet

A planet is a large, rounded astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself.

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Scale height

In atmospheric, earth, and planetary sciences, a scale height, usually denoted by the capital letter H, is a distance (vertical or radial) over which a physical quantity decreases by a factor of e (the base of natural logarithms, approximately 2.718).

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Solar wind

The solar wind is a stream of charged particles released from the Sun's outermost atmospheric layer, the corona.

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Thermosphere

The thermosphere is the layer in the Earth's atmosphere directly above the mesosphere and below the exosphere.

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