Double planet and Natural satellite

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Difference between Double planet and Natural satellite

Double planet vs. Natural satellite

In astronomy, a double planet (also binary planet) is a binary system where both objects are of planetary mass. A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet (or sometimes another small Solar System body).

Astronomical object

An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.

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Barycenter

The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.

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Charon (moon)

Charon, also known as (134340) Pluto I, is the largest of the five known natural satellites of the dwarf planet Pluto.

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Co-orbital configuration

In astronomy, a co-orbital configuration is a configuration of two or more astronomical objects (such as asteroids, moons, or planets) orbiting at the same, or very similar, distance from their primary, i.e. they are in a 1:1 mean-motion resonance.

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Deimos (moon)

Deimos (systematic designation: Mars II) is the smaller and outer of the two natural satellites of the planet Mars, the other being Phobos.

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Dwarf planet

A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.

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Dysnomia (moon)

Dysnomia (Greek: Δυσνομία)—officially (136199) Eris I Dysnomia—is the only known moon of the dwarf planet Eris (the most massive known dwarf planet in the Solar System).

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Eris (dwarf planet)

Eris (minor-planet designation 136199 Eris) is the most massive and second-largest (by volume) dwarf planet in the known Solar System.

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Giant-impact hypothesis

The giant-impact hypothesis, sometimes called the Big Splash, or the Theia Impact suggests that the Moon formed out of the debris left over from a collision between Earth and an astronomical body the size of Mars, approximately 4.5 billion years ago, in the Hadean eon; about 20 to 100 million years after the solar system coalesced.

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International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

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Mars

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

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Minor planet

A minor planet is an astronomical object in direct orbit around the Sun (or more broadly, any star with a planetary system) that is neither a planet nor exclusively classified as a comet.

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Moon

The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

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Moons of Mars

The two moons of Mars are Phobos and Deimos.

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Neptune

Neptune is the eighth and farthest known planet from the Sun in the Solar System.

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Neso (moon)

Neso (Greek: Νησώ), also known as Neptune XIII, is the outermost natural satellite of Neptune.

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Phobos (moon)

Phobos (systematic designation) is the innermost and larger of the two natural satellites of Mars, the other being Deimos.

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Phoebe (moon)

Phoebe (Greek: Φοίβη Phoíbē) is an irregular satellite of Saturn with a mean diameter of 213 km.

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Planet

A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.

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Pluto

Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.

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Psamathe (moon)

Psamathe (Latin: Psamathē; Greek: Ψαμάθη), also known as Neptune X, is a retrograde irregular satellite of Neptune.

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Solar System

The Solar SystemCapitalization of the name varies.

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Titan (moon)

Titan is the largest moon of Saturn.

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Triton (moon)

Triton is the largest natural satellite of the planet Neptune, and the first Neptunian moon to be discovered.

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Tug of war (astronomy)

The tug of war in astronomy is the ratio of planetary and solar attractions on a natural satellite.

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79360 Sila–Nunam

79360 Sila–Nunam, provisional designation, is a double cold classical Kuiper belt object (cubewano) with components of almost equal size, orbiting beyond Neptune in the Solar System.

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90 Antiope

90 Antiope is a double asteroid in the outer asteroid belt.

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