n
(planetology) On a Solar System body, a region with distinct brightness when seen using a telescope; often does not correspond any real geological formation.
n
(astronomy) Abbreviation of Astronomy Picture of the Day.
n
(astronomy) The stellar equivalent of the heliopause
n
A binary star system where one of the stars is a pulsar.
n
(astronomy, stars) Abbreviation of blue supergiant. [(astronomy) a very large, hot and luminous star; a large blue giant]
n
A astronomical term that describes grouping of stars in the Milky way galaxy halo that are 2,500 times lower than the sun
n
(astronomy) a cluster of stars — a star cluster
v
(astronomy) Of a celestial body: to become gravitationally dominant, such that there are no other bodies of comparable size within its orbit, other than its natural satellites or those otherwise under its gravitational influence.
n
(astronomy) The central part of a star cluster, where stars are most densely packed.
n
(astronomy, archaic) a Dreyer object — an entry/object in the New General Catalogue (NGC) compiled by J. L. E. Dreyer.
n
(astronomy) A star that does not belong to a star cluster
n
(astronomy) A large planet composed mostly of gaseous hydrogen and helium, along with methane and ammonia; possibly with a solid core.
n
(space science) An orbit where spacecraft which have reached their end of life can be safely positioned to avoid colliding with other spacecraft or the Earth.
n
(astronomy) A nova or supernova recorded by the Chinese.
n
(astronomy) A graphic representation of the absolute magnitude of stars against their color (or surface temperature), which shows the main sequence of stars plus the white dwarfs and red giants.
n
M31-V1: A star, a cepheid variable in Andromeda Galaxy, Local Group, Local Supercluster, Laniakea, located in the Andromeda constellation; the first variable star discovered outside the Milky Way Galaxy, and first star identified whose distance was unequivocably beyond the confines of the Milky Way.
n
(planetology) The solid material found in the centre of some planets at extremely high temperature and pressure, distinct from the liquid outer core.
n
A theoretical scenario in which the density of objects in low Earth orbit due to space pollution is high enough that collisions between objects could cause a cascade in which each collision generates debris that increases the likelihood of further collisions.
n
(astrophysics) Abbreviation of fifth Lagrange point, located 60 degrees behind on the orbit of the smaller object in orbit around a larger one
n
(astronomy) A type of blazar (highly variable active galactic nucleus) that lacks spectral emission lines characteristic of quasars.
n
(astronomy) A catalogue number used to identify any one of more than one hundred galaxies, nebulae, and other deep-sky objects visible in the night sky; the designation formed by the surname Messier or letter M being prepended to the number, as in Messier 31 or M31 (the Andromeda Galaxy).
n
(astronomy) Abbreviation of Markarian galaxy. [(astronomy) Any of a class of galaxies that have nuclei with excessive amounts of ultraviolet emissions.]
n
(astronomy) a more or less irregular star cluster containing tens to thousands of stars
n
(astronomy) A minor spiral arm of the Milky Way galaxy, containing the Solar System.
n
A spiral arm in Milky Way Galaxy.
n
(astronomy) A nebulosity surrounding a dying red giant, consisting of material expelled by the star.
n
(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
n
(astronomy) A collection of gas and dust in space with high temperature that usually grows to the point of beginning nuclear fusion and becoming a star.
n
(astronomy) A luminous celestial body, made up of plasma (particularly hydrogen and helium) and having a spherical shape. Depending on context the sun may or may not be included.
n
(astronomy) A group of gravitationally bound stars and other material (such as nebulae and planets), conventionally with one generation of similarly aged stars from the same pre-stellar nebula.
adj
(astronomy) Describing a region of space in which new stars are being formed
adj
Alternative spelling of star-forming [(astronomy) Describing a region of space in which new stars are being formed]
adj
(astronomy, not comparable) Of, pertaining to, or characteristic of stars.
n
(astronomy) Synonym of nova
n
(astronomy) A parameter (between 0.0 and 1.0), generated by a neural network, that seeks to characterize how stellar an observed astronomical object is.
n
(astronomy) A star that is dimmer than a main sequence star of same temperature. They are located below the main sequence in the Hertzsprung-Russell diagram.
n
(astronomy) A substellar object.
n
(astronomy) A bolide with a high apparent magnitude.
n
(astrophysics) A donut-shaped body of vaporized and molten rock formed from the collision of two planet-sized objects.
n
(astronomy) a variable star
n
(astronomy) A variable star.
n
(astronomy) Any star whose brightness varies.
n
(astronomy) A binary star whose components can be visually resolved.
n
(astronomy) A binary star system in which one star of the pair is an optically invisible X-ray source.
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