n
Alternative form of Pluto (Minor-planet designation for the dwarf planet) [(Greek mythology, Roman mythology) Greco-Roman god of the underworld.]
n
A crater on Mars, located within the larger Airy Crater, used as the determining landmark for the Martian prime meridian.
n
2012 December 9, Alan Pickup, in The Guardian:
n
Apoapsis around the planet Saturn.
n
(astronomy) The planet Mercury, when observed as a Morning Star.
n
(astronomy) An asteroid on a near-Earth trajectory.
n
(informal, humorous) Eye dialect spelling of Betelgeuse. [(astronomy) A bright-red supergiant intrinsic variable star, the second brightest star in the constellation Orion; Alpha (α) Orionis. It is the tenth brightest star in the nighttime, and one of the largest stars known.]
n
(astronomy) A constellation of the zodiac supposedly shaped like a crab.
n
(astronomy) Any of a shower of meteorites originating from the constellation Capricornus.
adj
(astrology) Pertaining to a type of asteroid, meteor, or comet, that contains mainly the carbon element and iron.
n
(astronomy, also capitalised) An icy planetoid that orbits the Sun between Jupiter and Neptune.
n
(astronomy) A celestial body orbiting between Mars and Jupiter, the largest asteroid and innermost dwarf planet; officially called 1 Ceres.
adj
(astronomy) That surrounds the primary star of a binary star system
n
(astrology, astronomy) The seven non-fixed astronomical objects in the sky visible to the naked eye that where known in Ancient history
n
(astronomy) A small Solar System body consisting mainly of volatile ice, dust and particles of rock whose very eccentric solar orbit periodically brings it close enough to the Sun that the ice vaporises to form an atmosphere, or coma, which may be blown by the solar wind to produce a visible tail.
n
Synonym of Halley's Comet
n
(astronomy) A small constellation said to resemble a crown.
n
(astronomy) Any meteor of a meteor shower that appears to originate from the constellation of Crater.
n
(astronomy) Any Kuiper belt object whose orbit is not determined by resonance with Neptune (orbit ~ 40-50 AU).
n
(astronomy) An asteroid (such as 5335 Damocles) that exhibits long-period, highly eccentric orbits typical of periodic comets without showing a coma.
n
(astronomy) Synonym of Kuiper belt object
n
(astronomy) a Chinese constellation near Aquarius and Equuleus, one of the 28 lunar mansions and part of the Black Turtle.
n
(astronomy) A cloud on Jupiter that hangs out of its home belt or zone into an adjacent area forming a curved finger-like image or a complete loop back to its home belt or zone.
n
(astronomy) Any meteor of a prolific meteor shower caused by the object 3200 Phaethon, and appearing to come from the radiant in the constellation of Gemini.
n
(astronomy, now rare, historical) Georgium Sidus, the planet Uranus.
n
Any of several stars in the constellations between Scorpius and Libra.
n
(astronomy) A period of cometary activity when the comet becomes exceptionally bright.
n
A great comet which can be seen from Earth every 75–76 years.
n
(astronomy) An orange giant and the brightest star in the constellation Aries; alpha (α) Arietis.
n
(astronomy) A centaur or transneptunian object.
n
A class of planets that are similar in mass to Jupiter.
n
(astronomy) A unit of mass equal to the mass of the planet Jupiter, used to express the mass of other planets. 1 M_J = 2 × 10²⁷ kg.
n
(uncountable, astronomy) Gerard Kuiper (U.S. planetary astronomer)
n
Alternative letter-case form of Kuiper belt [(astronomy) A region of space between 30 and 50 astronomical units from the Sun, roughly confined within a thick band around the ecliptic of the Solar System. This area is populated by many thousands of trans-Neptunian objects.]
n
(astronomy) A Kuiper belt object, such as Pluto
adj
(astronomy) Pertaining to Kuiper belt objects
n
(astronomy, obsolete) The planet Neptune.
n
(astronomy) Any meteor of a meteor shower appearing to originate in the constellation of Libra.
n
(astronomy) Polaris, the most used lodestar of the northern sky.
n
(astronomy) A shooting star or meteor observed as originating from the constellation Lyra, and belonging to the meteor shower seen each April.
n
Planet X, the mythical/hypothetical tenth planet in our solar system.
n
(astronomy) The fourth planet in the solar system. Symbol: ♂
n
A very large constellation
n
(astronomy) a comet having a period of revolution shorter than 200 years and a perihelion distance smaller than 1.3 au
n
Alternative spelling of nonperiodic comet [(astronomy) A comet that does not return to near the sun in a regular orbit.]
n
Any of the meteors in a prolific meteor shower associated with Halley's Comet.
n
A comet whose orbit is parabolic and so makes only a single visit to the inner solar system
n
(astronomy) A comet which orbits the Sun and which returns to the innermost point of its orbit at known, regular intervals.
n
Alternative form of periodic comet [(astronomy) A comet which orbits the Sun and which returns to the innermost point of its orbit at known, regular intervals.]
n
Periapsis around Neptune.
n
(astronomy) Any planetoid in the Kuiper belt whose orbit, like that of Pluto, has a resonance of 3:2 with that of Neptune.
n
(astronomy) Originally known as the ninth planet in the solar system but reclassified in 2006 as a dwarf planet; the brightest and first known Kuiper belt object; represented by the symbol ♇ as a planet or as a dwarf planet in astronomy; both are used in astrology, where symbols are more common.
n
(astrology) A hypothetical/fictitious planet beyond Pluto
adj
Describing a ring of dust, surrounding a young planet, out of which moons develop
n
(astronomy) A constellation of the zodiac supposedly shaped like a centaur who is an archer.
n
Alternative form of short-period comet [(astronomy) Any periodic comet with an orbital period of less than 200 years.]
n
(astronomy) Any periodic comet with an orbital period of less than 200 years.
n
(astronomy) The planet Uranus.
n
(astronomy) The planet Neptune.
n
(astronomy) An alternate name for a transneptunian object.
n
(rare, astronomy) A giant comet.
n
(astronomy) Initialism of trans-Neptunian object. [(astronomy) Any natural object (usually a minor planet (asteroid) or a hypothetical planet) in the Solar System with all or most of its orbit outside the orbit of planet Neptune.]
n
(astronomy) The seventh planet in our solar system, discovered in 1781 by Sir William Herschel.
n
HD 75898 b, an exoplanet approximately 2.71 times the mass of Jupiter in the Stribor system, ~255 ly from Earth.
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