uranology
English Thesaurus
1. the branch of physics that studies celestial bodies and the universe as a whole (noun.cognition)
hyponym | : | astrodynamics, |
definition | : | the branch of astronomy that studies the motion of natural and artificial bodies in space (noun.cognition) |
hyponym | : | astrometry, |
definition | : | the branch of astronomy that deals with the measurement of the position and motion of celestial bodies (noun.cognition) |
hyponym | : | radio astronomy, |
definition | : | the branch of astronomy that detects and studies the radio waves emitted by celestial bodies (noun.cognition) |
hyponym | : | celestial mechanics, |
definition | : | the branch of astronomy concerned with the application of Newton's laws of motion to the motions of heavenly bodies (noun.cognition) |
hyponym | : | astrophysics, |
definition | : | the branch of astronomy concerned with the physical and chemical properties of celestial bodies (noun.cognition) |
hyponym | : | selenology, |
definition | : | the branch of astronomy that deals with the moon (noun.cognition) |
hyponym | : | solar physics, |
definition | : | the branch of astronomy that deals with the sun (noun.cognition) |
domain member category | : | phase, |
definition | : | (astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun) (noun.attribute) |
domain member category | : | absolute magnitude, |
definition | : | (astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth (noun.attribute) |
domain member category | : | hubble law, hubble's law, |
definition | : | (astronomy) the generalization that the speed of recession of distant galaxies (the red shift) is proportional to their distance from the observer (noun.cognition) |
domain member category | : | copernican system, |
definition | : | (astronomy) Copernicus' astronomical model in which the Earth rotates around the sun (noun.cognition) |
domain member category | : | ptolemaic system, |
definition | : | (astronomy) Ptolemy's model of the universe with the Earth at the center (noun.cognition) |
domain member category | : | ascension, |
definition | : | (astronomy) the rising of a star above the horizon (noun.event) |
domain member category | : | egress, emersion, |
definition | : | (astronomy) the reappearance of a celestial body after an eclipse (noun.event) |
domain member category | : | immersion, ingress, |
definition | : | (astronomy) the disappearance of a celestial body prior to an eclipse (noun.event) |
domain member category | : | alignment, conjunction, |
definition | : | (astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac (noun.event) |
domain member category | : | inferior conjunction, |
definition | : | (astronomy) the alignment of the Earth and a planet on the same side of the sun (noun.event) |
domain member category | : | superior conjunction, |
definition | : | (astronomy) the alignment of the Earth and a planet on the opposite side of the sun (noun.event) |
domain member category | : | oort cloud, |
definition | : | (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun (noun.group) |
domain member category | : | extragalactic nebula, galaxy, |
definition | : | (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust (noun.group) |
domain member category | : | apoapsis, point of apoapsis, |
definition | : | (astronomy) the point in an orbit farthest from the body being orbited (noun.location) |
domain member category | : | node, |
definition | : | (astronomy) a point where an orbit crosses a plane (noun.location) |
domain member category | : | equinoctial point, equinox, |
definition | : | (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic (noun.location) |
domain member category | : | vernal equinox, |
definition | : | (astronomy) the equinoctial point that lies in the constellation of Pisces (noun.location) |
domain member category | : | autumnal equinox, |
definition | : | (astronomy) the equinoctial point that lies in the constellation of Virgo (noun.location) |
domain member category | : | barycenter, |
definition | : | (astronomy) the common center of mass around which two or more bodies revolve (noun.location) |
domain member category | : | culmination, |
definition | : | (astronomy) a heavenly body's highest celestial point above an observer's horizon (noun.location) |
domain member category | : | limb, |
definition | : | (astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet (noun.location) |
domain member category | : | periapsis, point of periapsis, |
definition | : | (astronomy) the point in an orbit closest to the body being orbited (noun.location) |
domain member category | : | anomaly, |
definition | : | (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun) (noun.location) |
domain member category | : | celestial latitude, dec, declination, |
definition | : | (astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere (noun.location) |
domain member category | : | celestial longitude, ra, right ascension, |
definition | : | (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere (noun.location) |
domain member category | : | asterism, |
definition | : | (astronomy) a cluster of stars (or a small constellation) (noun.object) |
domain member category | : | canal, |
definition | : | (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion (noun.object) |
domain member category | : | coma, |
definition | : | (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed (noun.object) |
domain member category | : | comet, |
definition | : | (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit (noun.object) |
domain member category | : | meteor, meteoroid, |
definition | : | (astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere (noun.object) |
domain member category | : | nucleus, |
definition | : | (astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail (noun.object) |
domain member category | : | outer planet, |
definition | : | (astronomy) a major planet whose orbit is outside the asteroid belt (Jupiter, Saturn, Uranus, Neptune, Pluto) (noun.object) |
domain member category | : | major planet, planet, |
definition | : | (astronomy) any of the nine large celestial bodies in the solar system that revolve around the sun and shine by reflected light; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in order of their proximity to the sun; viewed from the constellation Hercules, all the planets rotate around the sun in a counterclockwise direction (noun.object) |
domain member category | : | primary, |
definition | : | (astronomy) a celestial body (especially a star) relative to other objects in orbit around it (noun.object) |
domain member category | : | star, |
definition | : | (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior (noun.object) |
domain member category | : | variation, |
definition | : | (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon) (noun.phenomenon) |
domain member category | : | red shift, redshift, |
definition | : | (astronomy) a shift in the spectra of very distant galaxies toward longer wavelengths (toward the red end of the spectrum); generally interpreted as evidence that the universe is expanding (noun.phenomenon) |
domain member category | : | accretion, |
definition | : | (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases (noun.process) |
domain member category | : | libration, |
definition | : | (astronomy) a real or apparent slow oscillation of a moon or satellite (noun.process) |
domain member category | : | nucleosynthesis, |
definition | : | (astronomy) the cosmic synthesis of atoms more complex than the hydrogen atom (noun.process) |
domain member category | : | orbital plane, |
definition | : | (astronomy) the plane on which a body is orbiting (noun.shape) |
domain member category | : | ha, hour angle, |
definition | : | (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day (noun.shape) |
domain member category | : | inclination, inclination of an orbit, |
definition | : | (astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees (noun.shape) |
domain member category | : | mean solar time, mean time, |
definition | : | (astronomy) time based on the motion of the mean sun (an imaginary sun moving uniformly along the celestial equator) (noun.time) |
domain member category | : | date of reference, epoch, |
definition | : | (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded (noun.time) |
domain member category | : | go down, go under, set, |
definition | : | disappear beyond the horizon (verb.motion) |
domain member category | : | stargaze, |
definition | : | observe the stars (verb.perception) |
domain member category | : | active, |
definition | : | (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions (adj.all) |
domain member category | : | quiet, |
definition | : | of the sun characterized by a low level of surface phenomena like sunspots e.g. (adj.all) |
domain member category | : | direct, |
definition | : | moving from west to east on the celestial sphere; or--for planets--around the sun in the same direction as the Earth (adj.all) |
domain member category | : | retrograde, |
definition | : | moving from east to west on the celestial sphere; or--for planets--around the sun in a direction opposite to that of the Earth (adj.all) |
domain member category | : | superior, |
definition | : | having an orbit farther from the sun than the Earth's orbit (adj.all) |
domain member category | : | inferior, |
definition | : | having an orbit between the sun and the Earth's orbit (adj.all) |
domain member category | : | nebular, nebulous, |
definition | : | of or relating to or resembling a nebula (adj.pert) |
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