n
(astronomy) A star of spectral type A that shows emission lines in its spectrum
n
(astronomy) A companion body that trails a satellite or spacecraft.
n
(stellar astronomy) The outer edge of the corona. The boundary that separates a star's atmosphere from its exosphere (heliosphere, astrosphere), where Alfven waves transition into stellar wind (solar wind).
n
(astronomy) An unofficial constellation (small group of stars that forms a visible pattern).
n
A form of compass in which direction is evaluated by sighting stars of known position
n
(astronomy) A star of spectral type B that shows emission lines in its spectrum
n
(astronomy) A stellar system in which two stars orbit around their center of mass; double star.
n
(astronomy) One of the faint, hazy markings resembling straight lines on early telescopic images of the surface of Mars.
adj
(astronomy) That surrounds a multiple star
n
An image associated with a group of stars.
n
A starquake in the crust of a neutron star
n
(slang, colloquial, Canada, US, television, dated) a direct-to-home satellite television satellite (used by the cable television provider industry, to describe their competitors and the effect they would have in decimating the cable industry, prior to the introduction of digital satellite television and the three-foot dish revolution)
n
(science fiction) A hypothetical genetically engineered plant that could grow in a comet.
n
(astronomy) Any of a class of extrinsic variable stars where changes in brightness are caused by stars eclipsing each other.
n
(astronomy) Any star that is so distant that its movement, relative to others, is not perceptible; in practice, any star except the sun
n
(astrobiology, astronomy) the zone in a disk galaxy lying within the disk which is neither too far from the core so as to be lacking in heavier elements, nor too close to the core as to experience excessive exposures to supernovae, where intelligent life may develop
n
(astronomy) A reference star that is used to maintain the alignment and tracking of a telescope (as the Earth rotates)
n
(astronomy) The layer between two stellar shells, particularly between the hydrogen and helium shells.
n
Kepler space telescope, a stellar transit tracker used for finding exoplanets
n
(astronomy) A gap in the distribution of semi-major axes of asteroids in the main belt.
n
(uncountable, astrocartography) The star catalogue compiled by Abbé Nicolas-Louis de Lacaille
adj
(astronomy) Of a star or class of stars, cooler than the sun.
n
(astronomy, archaic or misused, an occasional carry-over from astrology to astronomy) Synonym of albedo in terms of a planet's, such as that of Mars, average surface spectral reflectivity.
n
Alternative form of main sequence. [(astronomy) A major grouping of stars represented on a Hertzsprung-Russell diagram by a nearly uniform band of increasing luminosity with increasing surface temperature.]
n
(astronomy) A very large solar flare
n
Charles Messier (1730-1817), a French astronomer who between 1774 and 1781 published his Catalogue of Nebulae and Star Clusters, a catalogue of deep-sky objects.
n
A fast-moving streak of light in the night sky caused by the entry of extraterrestrial matter into the earth's atmosphere; a shooting star or falling star.
n
(astronomy) A phenomenon occurring when many meteors are seen on Earth during a short period of time.
n
(astronomy) Multiple stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields; a multiple star system.
n
(astronomy) A cloud in outer space consisting of gas or dust (e.g. a cloud formed after a star explodes).
n
(science fiction) A solid ring type Dyson ring around a star, capable of containing an interior surface that could be terraformed into a habitat with an inner ring of occultation panels to provide a day-night cycle.
n
(astronomy) A star positioned circumpolar to the North Pole.
n
(astronomy) The ejected material left behind by novae.
n
(astronomy) A nebula; specifically, the Magellanic Clouds.
n
(astronomy) A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system.
n
(astronomy) Any astronomical object that suddenly produces an outburst of radiation (especially radio waves)
adj
(astronomy) More luminous than an equivalent star of the main sequence
n
(astronomy) Four stars that appear to be one when seen with the naked eye, either because they orbit one another (quadruple star systems) or happen to be in the same line of sight even though they are separated by a great distance.
n
(astronomy) A stellar system that has four stars orbiting around each other; quadruple star
adj
Alternative form of quasistellar [Similar to a star.]
n
(astronomy) A star whose identity, position and magnitude are accurately known
n
(astronomy) A nebula that consists of dust which reflects starlight and appears blue in photographs.
n
(astronomy) A formation of various pieces of material orbiting around a planet or young star.
n
(astronomy) The total number of stars in the observable universe, often estimated to be in the sextillions.
n
Smithsonian Astrophysical Observatory (or the star catalog)
n
(astronomy) A constellation that is only above the horizon (and thus visible) for part of the year.
n
Alternative form of Shkadov thruster [(astronautics, space science) A hypothetical megastructure consisting of a gargantuan statite used to redirect the radiation pressure of a star, generating a net thrust which slowly accelerates the whole system in the direction of the statite.]
n
Alternative form of shooting star (flowering plant) [A meteor, especially a streak of light in the night sky, caused by a meteoroid burning up as it enters the Earth’s atmosphere.]
n
(astronomy) A star system consisting of a solitary star not gravitationally bound to other stars
n
(astronomy) A disc-shaped cloud of gas and dust left over from the formation of the Sun.
n
Any collection of heavenly bodies including a star or binary star, and any lighter stars, brown dwarfs, planets, and other objects in orbit.
n
(astronomy) Any astronomical object of known absolute magnitude. Its distance can then be calculated from its apparent magnitude.
n
Any small luminous dot appearing in the cloudless portion of the night sky, especially with a fixed location relative to other such dots.
n
(astronomy) A map of the night sky used to identify and locate astronomical objects such as stars, constellations and galaxies.
n
(astronomy) A large group of many stars spread over very many light-years of space; the stars are not part of any structure but are in an area of greater than average stellar density.
n
(science fiction) A hypothetical process wherein a portion of a star's mass is removed, generally to serve as an energy source.
n
The device used to project images of celestial objects onto the dome in a planetarium.
n
(astronomy) A line of stars, originally from a dwarf galaxy, that have been captured by gravitational interaction with the Milky Way
n
(astronomy) A group of stars (and possibly smaller bodies such as planets or asteroids) that orbit one another.
n
A navigational device which measures the angular separation of stars with reference to a known time and place in order to achieve precise navigation.
n
(astronomy, very rare) An intense and visible ray of starlight; a ray or rays emitted from the star.
v
(astronomy, of a region of space) To experience an unusually high rate of star formation.
n
(informal, dated) A distant cluster of stars resembling a cloud of dust, especially if the individual stars of which cannot be resolved with a telescope.
n
(meteorology, astrology, rare) A great number of stars descending downward within outer space or the atmosphere.
n
The act of gazing at the stars; astronomy.
n
The state of being a star (whether an astronomic object or a celebrity).
n
Light emitted from stars other than the Sun.
n
The study, knowledge, or science of stars; astrology; astronomy.
n
(Scotland, Northern England) A star.
n
(astronomy) A picture or view of a field of stars.
n
(astronomy) The time of day or night when a given star disappears below the horizon.
n
(astronomy) The equivalent of a sunspot on another star.
n
The material composition of stars; matter originated from stars; starmatter.
n
(astronomy) A subordinate constellation.
n
(astronomy) A very large region of space, relatively free of matter, carved out of the interstellar medium by the combination of multiple supernova bubbles resulting from supernova explosions.
n
(rare, astronomy) A giant star.
n
(astronomy) symbiotic star
n
(astronomy) A stellar system that has three stars orbiting around each other; triple star.
n
(astronomy) Three stars that appear to be one when seen with the naked eye, either because they orbit one another (trinary stars) or happen to be in the same line of sight even though they are separated by a great distance.
n
(astronomy) a trinary star
n
A giant planet, of similar mass to that of Jupiter, which orbits close enough to its sun to become tidally locked, and whose day-side atmosphere has therefore heated up so much, as to break apart most molecules, leaving atomic gas. The day-side atmosphere has the temperature and spectral characteristics of a star's surface.
n
(astronomy) An extended region of space containing no galaxies
n
(science fiction, fantasy) A wandering star or other similar heavenly body; a comet; meteor; planet.
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