- asterism: any prominent star pattern that isn’t a whole constellation.
- albedo: the reflective property of a non-luminous object.
- apastron: the point of greatest separation of two stars, such as in a binary star system.
- aphelion: the point in the orbit of a planet, asteroid, or comet at which it is farthest from the sun.
- astral: relating to or resembling the stars.
- aurora: aglow in a planet's ionosphere caused by the interaction between the planet's magnetic field and charged particles from the sun.
- caldera: a large volcanic crater, especially one formed by a major eruption leading to the collapse of the mouth of the volcano.
- celestial: positioned in or relating to the sky, or outer space as observed in astronomy.
- constellation: a group of stars forming a recognizable pattern.
- cosmos: the universe seen as a well-ordered whole.
- cosmology: a branch of science that deals with studying the origin, structure, and nature of the universe.
- eclipse: the total or partial blocking of one celestial body by another.
- empyreal: pertaining to the sky; celestial.
- equinox: the time or date at which the sun crosses the celestial equator, when day and night are of equal length.
- faculae: bright patches that are visible on the sun’s surface.
- galaxy: a large grouping of stars.
- gravity: a mutual physical force of nature that causes two bodies to attract each other.
- heliopause: the point in space at which the solar wind meets the interstellar medium or solar wind from other stars.
- interstellar: occurring or situated between stars.
- lunation: the interval of a complete lunar cycle, between one new moon and the next.
- nebula: a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
- neutrino: a fundamental particle produced by the nuclear reactions in stars.
- nova: a star that flares up to several times its original brightness for some time before returning to its original state.
- orbit: the path of a celestial body as it moves through space.
- parallax: the apparent change in position of two objects viewed from different locations.
- perigee: the point in the orbit of the moon or other satellite at which it is closest to the earth.
- perihelion: the point in the orbit of a planet or other body where it is closest to the sun.
- photon: a particle of light composed of a minute quantity of electromagnetic energy.
- photosphere: the bright visible surface of the sun.
- planemo: a large planet or planetary body that does not orbit a star, instead, wander cold and alone through the cosmos.
- plasma: a form of ionized gas in which the temperature is too high for atoms to exist in their natural state.
- protostar: dense regions of molecular clouds where stars are forming.
- pulsar: a spinning neutron star that emits energy along its gravitational axis.
- quasar: an unusually bright object found in the remote areas of the universe.
- radiant: a point in the sky from which meteors in a meteor shower seem to originate.
- sidereal: of, relating to, or concerned with the stars.
- singularity: the center of a black hole, where the curvature of space time is maximal.
- solstice: the time of the year when the sun appears furthest north or south of the celestial equator.
- spectrum: the range of colors that make up visible white light.
- spicules: grass-like patterns of gas seen in the atmosphere of the sun.
- star: a giant ball of hot gas that creates and emits its own radiation through nuclear fusion.
- supermoon: a term used to describe a full moon that occurs during the moon's closest approach to the earth.
- supernova: a supernova is a cataclysmic explosion caused when a star exhausts its fuel and ends its life.
- syzygy: the alignment of three celestial bodies.
- synodic: relating to or involving the conjunction of stars, planets, or other celestial objects.
- tektite: a small, glassy material formed by the impact of a large body, usually a meteor or asteroid.
- terminator: the boundary between the light side and the dark side of a planet or other body.
- tidal force: the differential gravitational pull exerted on any extended body within the gravitational field of another body.
may 14 2017 ∞
nov 22 2018 +
nov 22 2018 +