ACG52 Posted July 21, 2015 Share Posted July 21, 2015 Nekkar- The Arabic name for the star Beta Bootis in the constellation Bootes Link to comment Share on other sites More sharing options...
Acme Posted July 21, 2015 Share Posted July 21, 2015 Regolith - Loose rocks and dust on a space body's surface. Link to comment Share on other sites More sharing options...
ACG52 Posted July 21, 2015 Share Posted July 21, 2015 Hadir-proper name of Beta Centuri Link to comment Share on other sites More sharing options...
Janus Posted July 21, 2015 Share Posted July 21, 2015 Rigel - brightest star in the constellation Orion. Link to comment Share on other sites More sharing options...
ACG52 Posted July 21, 2015 Share Posted July 21, 2015 Lesath - proper name of Upsilon Scorpii Link to comment Share on other sites More sharing options...
MigL Posted July 21, 2015 Share 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. Link to comment Share on other sites More sharing options...
ACG52 Posted July 21, 2015 Share 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. Link to comment Share on other sites More sharing options...
MigL Posted July 21, 2015 Share 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 ). Link to comment Share on other sites More sharing options...
Janus Posted July 21, 2015 Share Posted July 21, 2015 Astrolabe - An early astronomical instrument used to measure angular distance. Link to comment Share on other sites More sharing options...
Acme Posted July 21, 2015 Share 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 Link to comment Share on other sites More sharing options...
MigL Posted July 21, 2015 Share 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. Link to comment Share on other sites More sharing options...
zapatos Posted July 22, 2015 Share Posted July 22, 2015 Antipodal point - the point that is directly on the opposite side of the planet Link to comment Share on other sites More sharing options...
ACG52 Posted July 22, 2015 Share Posted July 22, 2015 Taurus -a large and prominent constellation in the northern hemisphere's winter sky. Link to comment Share on other sites More sharing options...
Janus Posted July 22, 2015 Share Posted July 22, 2015 Synodic period - the time interval between successive oppositions or superior conjunctions of a planet. Link to comment Share on other sites More sharing options...
MigL Posted July 22, 2015 Share 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. Link to comment Share on other sites More sharing options...
ACG52 Posted July 22, 2015 Share Posted July 22, 2015 (edited) Messier, Charles -published the Messier catalogue of nebulae and star clusters in 1774. Edited July 22, 2015 by ACG52 Link to comment Share on other sites More sharing options...
MigL Posted July 22, 2015 Share Posted July 22, 2015 Swift Space telescope/observatory dedicated to the study of gamma ray bursts. Link to comment Share on other sites More sharing options...
Acme Posted July 22, 2015 Share Posted July 22, 2015 Titania - The largest moon of Uranus. Link to comment Share on other sites More sharing options...
MigL Posted July 22, 2015 Share Posted July 22, 2015 A.U. Astronomical unit, approx. 93,000,000 miles, the distance from Earth to Sun. Link to comment Share on other sites More sharing options...
ACG52 Posted July 22, 2015 Share 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 Link to comment Share on other sites More sharing options...
MigL Posted July 22, 2015 Share 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. Link to comment Share on other sites More sharing options...
Janus Posted July 22, 2015 Share 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. Link to comment Share on other sites More sharing options...
MigL Posted July 22, 2015 Share 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 ) Link to comment Share on other sites More sharing options...
Janus Posted July 22, 2015 Share Posted July 22, 2015 Yi Xing - 7th century Chinese astronomer. Link to comment Share on other sites More sharing options...
ACG52 Posted July 22, 2015 Share 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. Link to comment Share on other sites More sharing options...
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