Nekkar- The Arabic name for the star Beta Bootis in the constellation Bootes

Regolith - Loose rocks and dust on a space body's surface.

Hadir-proper name of Beta Centuri

Rigel - brightest star in the constellation Orion.

Lesath - proper name of Upsilon Scorpii

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.

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.

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 ).

Astrolabe - An early astronomical instrument used to measure angular distance.

Enceladus - A moon of Saturn discovered by William Herschel in 1789 & named for a mythological giant.

Edited July 21, 201510 yr by Acme

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.

Antipodal point - the point that is directly on the opposite side of the planet

Taurus -a large and prominent constellation in the northern hemisphere's winter sky.

Synodic period - the time interval between successive oppositions or superior conjunctions of a planet.

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.

Messier, Charles -published the Messier catalogue of nebulae and star clusters in 1774.

Edited July 22, 201510 yr by ACG52

Swift

 

Space telescope/observatory dedicated to the study of gamma ray bursts.

Titania - The largest moon of Uranus.

A.U.

 

Astronomical unit, approx. 93,000,000 miles, the distance from Earth to Sun.

Upsilon Andromedae - a binary star approximately 44 lys from earth in the constellation Andromeda

Edited July 22, 201510 yr by ACG52

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.

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.

Escape Velocity

 

The speed required to defeat the surface gravity of an astronomical object and escape to infinity ( i.e. no fall back )

Yi Xing - 7th century Chinese astronomer.

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.