ACG52 Posted July 21, 2015 Posted July 21, 2015 Nekkar- The Arabic name for the star Beta Bootis in the constellation Bootes
Acme Posted July 21, 2015 Posted July 21, 2015 Regolith - Loose rocks and dust on a space body's surface.
MigL Posted July 21, 2015 Posted July 21, 2015 Hubble, Edwin Discovered that some 'nebulae' are actually 'island universes' or galaxies. Discovered ( with others ) that their red shift implies recession according to distance based on Cepheid variable markers.
ACG52 Posted July 21, 2015 Posted July 21, 2015 NGC 1300 -a barred spiral galaxy about 61 million light‑years away in the constellation Eridanus. The galaxy is about 110,000 light-years across; about 2/3 the size of our own galaxy, the Milky Way.
MigL Posted July 21, 2015 Posted July 21, 2015 Hey, not fair, you ended in a number ! 0.692=OmegaLambda ( according to recent Planck results, consider yourself lucky that I don't use LaTex ) The ratio between the energy density due to the cosmological constant and the critical density ( density required to stop the universe from expanding forever ).
Janus Posted July 21, 2015 Posted July 21, 2015 Astrolabe - An early astronomical instrument used to measure angular distance.
Acme Posted July 21, 2015 Posted July 21, 2015 (edited) Enceladus - A moon of Saturn discovered by William Herschel in 1789 & named for a mythological giant. Edited July 21, 2015 by Acme
MigL Posted July 21, 2015 Posted July 21, 2015 Supernova A stellar explosion, triggered by reignition of a degenerate star or the gravitational collapse of the core of a massive star, that can briefly outshine a whole galaxy.
zapatos Posted July 22, 2015 Posted July 22, 2015 Antipodal point - the point that is directly on the opposite side of the planet
ACG52 Posted July 22, 2015 Posted July 22, 2015 Taurus -a large and prominent constellation in the northern hemisphere's winter sky.
Janus Posted July 22, 2015 Posted July 22, 2015 Synodic period - the time interval between successive oppositions or superior conjunctions of a planet.
MigL Posted July 22, 2015 Posted July 22, 2015 deSitter, Willem Originator of the concepts of deSitter space or universe, which are solutions to the field equations for an empty, expanding universe with a positive cosmological constant.
ACG52 Posted July 22, 2015 Posted July 22, 2015 (edited) Messier, Charles -published the Messier catalogue of nebulae and star clusters in 1774. Edited July 22, 2015 by ACG52
MigL Posted July 22, 2015 Posted July 22, 2015 Swift Space telescope/observatory dedicated to the study of gamma ray bursts.
MigL Posted July 22, 2015 Posted July 22, 2015 A.U. Astronomical unit, approx. 93,000,000 miles, the distance from Earth to Sun.
ACG52 Posted July 22, 2015 Posted July 22, 2015 (edited) Upsilon Andromedae - a binary star approximately 44 lys from earth in the constellation Andromeda Edited July 22, 2015 by ACG52
MigL Posted July 22, 2015 Posted July 22, 2015 Einstein-Rosen Bridge A 'tunnel' or wormhole through space with a Black Hole at either end and held open by being threaded with exotic ( negative energy ) matter.
Janus Posted July 22, 2015 Posted July 22, 2015 Eta Carinae - A stellar system which in the 1800's increased in brightness from a 4th magnitude star to a 1st magnitude star for a short time.
MigL Posted July 22, 2015 Posted July 22, 2015 Escape Velocity The speed required to defeat the surface gravity of an astronomical object and escape to infinity ( i.e. no fall back )
ACG52 Posted July 22, 2015 Posted July 22, 2015 Yildun- traditional name for Delta Ursae Minoris, an A type main sequence star in the constellation Ursa Minor, about 172 lys from earth. Ninjad Garnet star - proper name of Mu Cephei, a red supergiant in the constellation Cepheus. It is an M2 1a star,one of the largest and brightest stars in the Milky Way.
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