n
A comprehensive treatise on astronomy, alchemy, geography and/or mathematics (originally compiled by Ptolemy circa 150 C.E.).
adj
Outside of our own galaxy.
adj
(astronomy) Of or pertaining to an apogalacticon
n
(astronomy, geology, planetology) The analogue of the geoid for the planet Mars; the Martian geoid. The gravitational and rotational equipotential surface for Mars. The surface that provides the datum line (the equivalent for sea level) for Mars.
n
(cosmology) The phylogenetic analysis of galaxy evolution.
adj
(comparable) Very large; of vast measure.
adj
(astronomy) Surrounding a galaxy
adj
(astronomy) That surrounds, or revolves around a star
adj
(astronomy) Relating to the centre of a galactic cluster
adj
(astronomy) Pertaining to (the distance from) the centre of a galactic cluster
adj
Relative to the centre of a comet
n
(astronomy) A heliocentric model of the solar system, proposed in the 16th century by the eponymous astronomer.
adj
From an extraterrestrial source.
adj
Of or in the area of space beyond the gravitational influence of Earth, or outside the Solar System
adj
(astronomy) Existing outside of the Solar System; relating to that which exists outside of the Solar System.
n
(exobiology) A formula for calculating the probability of civilizations existing elsewhere in the Milky Way galaxy and of their ability to communicate with Earth.
n
(obsolete) Any one of the heavenly spheres believed to carry the celestial bodies.
adj
(astronomy) Of a gas giant: having a close orbit to its parent star
n
The region of space just outside the atmosphere proper; the outer atmosphere.
adv
In the nearby region of space outside Earth's atmosphere.
adj
(science fiction) Synonym of extragalactic (originating from outside the Milky Way galaxy)
adj
(astronomy) Of or pertaining to an exoplanet, a planet outside the solar system
adj
Outside Earth's solar system.
adj
Anything beyond Earth.
adj
(astronomy) Pertaining to the extrasolar ecliptic plane of star systems beyond the Solar System
adj
Alternative spelling of extraplanetary [Originating, or located outside of a planet]
adj
Alternative spelling of extrasolar [(astronomy) of or originating outside the Solar System.]
n
Alternative spelling of extraterrestrial [A being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien]
adj
Alternative spelling of extravehicular [Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space]
adj
Beyond or outside a continent.
adj
(science fiction) Coming from a dimension outside Einsteinian space-time.
adj
(astronomy) Originating outside of any galaxy.
adj
(astronomy) Outside of the meridian.
adj
(astronomy) Outside of the meridian.
adj
Extraterrestrial; occurring or originating outside of the Earth.
adj
Outside of a plane (especially that of the ecliptic)
adj
Originating, or located outside of a planet
adj
(astronomy) of or originating outside the Solar System.
adj
Originating from outside of the Earth's atmosphere, from space, or from another planet; alien to Earth or its environment.
adj
Relating to, on happening in, the space outside a vehicle, especially a spacecraft in space
adj
Outside of the zodiac.
n
(astronomy) The side of a moon that faces away from the planet that it orbits.
adj
galactic; relating to a galaxy
adv
With regard to galaxies, or in a galactic context.
adj
(astronomy) Relative to the centre of the galaxy
adj
(astronomy) Of or pertaining to a galaxy
adj
Alternative form of galaxywide [Throughout a galaxy.]
n
Galileo Galilei (1564–1642), an Italian thinker and key figure in the scientific revolution who improved the telescope, made astronomical observations, and put forward the basic principle of relativity in physics.
adj
(astronomy, rare) Moving away from the Earth.
adj
(astronomy) Having the sun at the center/centre; usually in reference to a solar system or orbit. [from 17th c.]
adj
Of or pertaining to a hypergalaxy.
adj
Above or beyond the Earth.
adj
(astronomy, obsolete) Not included within the figures of any of the ancient constellations.
adj
(astronomy, dated) Situated at so great a distance as to be beyond the effect of gravitation; said of stars supposed to be so far apart that the effect of their mutual attraction is undetectable.
adj
(astronomy) Occurring between galaxies.
adj
Between or among constellations or stars; interstellar.
adj
Occurring between two or more points within a galaxy.
adj
Of or pertaining to a metagalaxy
adj
(astronomy) Of or pertaining to a nebula.
adj
(astronomy, rare) Appearing as if seen from the centre of the planet Neptune; relating or referring to Neptune as a centre.
adj
Alternative form of nongalactic [(astronomy, astrophysics) Far from galaxies; not interacting with galaxies.]
adj
(astronomy, astrophysics) Far from galaxies; not interacting with galaxies.
n
(cosmogony) a regime of accretion of material in a protoplanetary disk where only the most massive objects can continue to grow
n
Region outside explored space.
adj
(informal) Of, relating to, or characteristic of outer space, science fiction, or futuristic technology.
adj
Throughout all galaxies.
adj
Across the stars; throughout all star systems.
adj
Of or pertaining to an perigalacticon
n
(astronomy) The point in the orbit of a star at which it is closest to the centre of its local galaxy
n
(astronomy) Any substantial body in orbit around the Sun or other star: a planet, minor planet, or comet.
adj
(astronomy) Based on a planet at the centre of a coordinate system
adj
Relating to a planetoid.
adj
(astronomy) Describing a meteoroid as it approaches the atmosphere
n
(astronomy) The use of previously gathered data (especially photographic images) to recover a recently discovered object (typically a small solar system body).
adj
Before formation of a galaxy.
adj
Relating to a stage in the life of a red giant star or its preplanetary nebula during the star's final stages of life
adj
(astronomy) older than the solar system
adj
(astronomy) Describing the matter and conditions involved in the formation of a star
adj
(astronomy) Describing the period, and the events, prior to a star becoming a supernova
adj
Alternative form of protoplanetary [(astronomy, planets) Of or pertaining to a protoplanet.]
adj
Pertaining to a protogalaxy.
adj
Relating to a stage in the life of a red giant star or its protoplanetary nebula during the star's final stages of life
adj
(astronomy) Describing the conditions prior to the formation of the solar system, or describing the protostar that became the sun
n
(informal) Abbreviation of Proxima Centauri. [(astronomy) A red dwarf star, part of the Alpha Centauri system and the nearest star to Earth's solar system.]
n
(astronomy) A geocentric model of the solar system, described by the eponymous astronomer.
n
The Copernican system of astronomy, erroneously attributed to Pythagoras.
adj
(sciences) Secondary to a main item.
adj
(physics, of the interval between two events in spacetime) lying outside each other's light cone, so that no information can pass from one to the other
adj
Of, relating to or pertaining to space, especially outer space; space-like.
adj
(colloquial) of, related to or connected with the extraterrestrial
adj
(astronomy) centered on a star
adj
Less than the size of a galaxy
adj
(of a satellite) orbiting closer to a planet that if it were in a synchronous orbit
adj
(planetology, of an elemental ratio) Greater than found in a typical chondrite.
adj
Of or pertaining to a supergalaxy.
adj
(astronomy) Larger than the cosmological horizon
adj
(astronomy) (of a planet) Closer to the Earth than to the Sun.
adj
(astronomy) Relating to a supernebula.
adj
(astronomy) Describing a period greater than an orbital period
n
(astronomy, planetology) Any very large planet, but especially a large superjovian gas giant
adj
Above ground; above the earth.
n
(physics) All parts of the universe that are not within the thermodynamic system of interest.
adj
Between or beyond the boundaries of galaxies.
adj
Situated beyond the Moon or its orbit; unworldly.
adj
Situated beyond or above the moon; superlunary.
adj
Beyond the planet; across more than one planet.
adj
(archaic) Beyond the sea.
adj
extraterrestrial; outside of earth or the universe
adj
Coming from outside the Earth; extraterrestrial.
adj
Beyond the planet Earth.
adj
Beyond the planet Earth.
adj
Situated beyond, or outside of, the tropics.
adj
(astronomy) Outside the zodiac; being in that part of the heavens that is more than eight degrees from the ecliptic.
n
A theoretical orbital zone around a star that will result in an Earth-like planet existing in an orbit in the zone having a runaway greenhouse effect, similar to that found on Venus in our Solar System. The inner edge of the zone is where solar radiation is intense enough to strip the atmosphere of a planet away. The outer edge is where solar radiation is insufficient to power a runaway greenhouse.
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