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Substellar object

Index Substellar object

A substellar object, sometimes called a substar, is an astronomical object whose mass is smaller than the smallest mass at which hydrogen fusion can be sustained (approximately 0.08 solar masses). [1]

27 relations: Astronomical object, Brown dwarf, Color of water, Degenerate matter, Density, Deuterium fusion, EF Eridani, Gas giant, Gravitational energy, Infrared spectroscopy, Jupiter, Kelvin–Helmholtz mechanism, Mass, Mini-Neptune, Nuclear fusion, Orbit, Planet, Radiative equilibrium, Solar mass, Solar radius, Star, Sub-brown dwarf, Substellar companion, Sun, Super-Earth, Terrestrial Planet Finder, William Duncan MacMillan.

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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Brown dwarf

Brown dwarfs are substellar objects that occupy the mass range between the heaviest gas giant planets and the lightest stars, having masses between approximately 13 to 75–80 times that of Jupiter, or approximately to about.

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Color of water

The color of water varies with the ambient conditions in which that water is present.

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Degenerate matter

Degenerate matter is a highly dense state of matter in which particles must occupy high states of kinetic energy in order to satisfy the Pauli exclusion principle.

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The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.

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Deuterium fusion

Deuterium fusion, also called deuterium burning, is a nuclear fusion reaction that occurs in stars and some substellar objects, in which a deuterium nucleus and a proton combine to form a helium-3 nucleus.

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EF Eridani

EF Eridani (abbreviated EF Eri, sometimes incorrectly referred to as EF Eridanus) is a variable star of the type known as polars, AM Herculis stars, or magnetic cataclysmic variable stars.

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Gas giant

A gas giant is a giant planet composed mainly of hydrogen and helium.

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Gravitational energy

Gravitational energy is the potential energy a body with mass has in relation to another massive object due to gravity.

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Infrared spectroscopy

Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) involves the interaction of infrared radiation with matter.

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Jupiter is the fifth planet from the Sun and the largest in the Solar System.

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Kelvin–Helmholtz mechanism

The Kelvin–Helmholtz mechanism is an astronomical process that occurs when the surface of a star or a planet cools.

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Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.

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A mini-Neptune or sub-Neptune (sometimes known as a gas dwarf or transitional planet) is a planet of up to 10 Earth masses, less massive than Uranus and Neptune, which have about 14.5 and 17, respectively.

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Nuclear fusion

In nuclear physics, nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

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In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.

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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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Radiative equilibrium

Radiative equilibrium is one of the several requirements for thermodynamic equilibrium, but it can occur in the absence of thermodynamic equilibrium.

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Solar mass

The solar mass is a standard unit of mass in astronomy, equal to approximately.

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Solar radius

Solar radius is a unit of distance used to express the size of stars in astronomy.

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A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Sub-brown dwarf

A sub-brown dwarf or planetary-mass brown dwarf is an astronomical object that formed in the same manner as stars and brown dwarfs (i.e. through the collapse of a gas cloud) but that has a mass below the limiting mass for thermonuclear fusion of deuterium (about). Some researchers call them free-floating planets whereas others call them planetary-mass brown dwarfs.

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Substellar companion

Substellar companion is a generic term for an astronomical body orbiting a star.

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The Sun is the star at the center of the Solar System.

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A super-Earth is an extrasolar planet with a mass higher than Earth's, but substantially below the masses of the Solar System's ice giants, Uranus and Neptune, which have masses of 15 and 17 times Earth's, respectively.

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Terrestrial Planet Finder

The Terrestrial Planet Finder (TPF) was a proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets.

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William Duncan MacMillan

William Duncan MacMillan (July 24, 1871 – November 1948) was an American mathematician and astronomer.

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Sub-star, Sub-stellar object, Sub-stellar objects, Substar, Substars, Substellar, Substellar objects.


[1] https://en.wikipedia.org/wiki/Substellar_object

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