MigL Posted July 22, 2015 Share Posted July 22, 2015 Roche limit The closest two astronomical bodies can get before one is broken up by tidal effects. Link to comment Share on other sites More sharing options...
ACG52 Posted July 22, 2015 Share Posted July 22, 2015 (edited) Taygeta -proper name of 19 Tauri, a triple star system in the constellation Taurus, 440 lys from earth. Edited July 22, 2015 by ACG52 Link to comment Share on other sites More sharing options...
MigL Posted July 23, 2015 Share Posted July 23, 2015 Accretion disc High speed, high energy matter spiraling into a black hole. Link to comment Share on other sites More sharing options...
Acme Posted July 23, 2015 Share Posted July 23, 2015 Catena - A chain of impact craters. Link to comment Share on other sites More sharing options...
Janus Posted July 23, 2015 Share Posted July 23, 2015 Andromedids. a meteor shower radiating out from the constellation Andromeda. While presently very weak, in the years 1872 and 1885 they put on a impressive display. Link to comment Share on other sites More sharing options...
ACG52 Posted July 23, 2015 Share Posted July 23, 2015 Saros Cycle - a period of 223 synodic months that can be used to predict solar and lunar eclipses. The saros cycle is equal to 6,585.3 days (18 years 11 days 8 hours). Link to comment Share on other sites More sharing options...
MigL Posted July 23, 2015 Share Posted July 23, 2015 Eotvos experiment Confirmed that different objects/composition fall at the same speed in a gravitational field. Link to comment Share on other sites More sharing options...
ACG52 Posted July 23, 2015 Share Posted July 23, 2015 Spicules- small,short lived patterns of gas seen in the atmosphere of the Sun. Link to comment Share on other sites More sharing options...
Janus Posted July 23, 2015 Share Posted July 23, 2015 spectroheliograph - An instrument which allows the entire Sun to be photographed in the light of a single spectral line. Link to comment Share on other sites More sharing options...
ACG52 Posted July 24, 2015 Share Posted July 24, 2015 Heliopause - the point in space at which the solar wind meets the interstellar medium.. Link to comment Share on other sites More sharing options...
MigL Posted July 24, 2015 Share Posted July 24, 2015 Enterprise One of the space shuttles, and, a famous 23rd century starship on a 5 yr mission. Link to comment Share on other sites More sharing options...
ACG52 Posted July 24, 2015 Share Posted July 24, 2015 Endeavour- the fifth and last shuttle built. It flew 25 missions the first in May of 1992 and the last in May of 2011. Link to comment Share on other sites More sharing options...
MigL Posted July 24, 2015 Share Posted July 24, 2015 Red-shift The shifting of spectral lines towards longer wavelengths due to recession. Link to comment Share on other sites More sharing options...
Acme Posted July 25, 2015 Share Posted July 25, 2015 Thalassa - A moon of Neptune discovered in 1989 by the Voyager II spacecraft. Link to comment Share on other sites More sharing options...
ACG52 Posted July 25, 2015 Share Posted July 25, 2015 Aldebaran -an orange giant star located about 65 light years away in the zodiac constellation of Taurus. With an average apparent magnitude of 0.87 it is the brightest star in the constellation and is one of the brightest stars in the nighttime sky. Link to comment Share on other sites More sharing options...
Acme Posted July 25, 2015 Share Posted July 25, 2015 Nadir - The point on the celestial sphere directly below the observer and opposite the zenith. Link to comment Share on other sites More sharing options...
ACG52 Posted July 25, 2015 Share Posted July 25, 2015 We're repeating ourselves. The threads too large to go back and see if something has been used. Link to comment Share on other sites More sharing options...
Acme Posted July 25, 2015 Share Posted July 25, 2015 We're repeating ourselves. The threads too large to go back and see if something has been used. I overlooked your repetition of my saros entry, can you see your way to overlook my repetition of your nadir? Naiad = Another moon of Neptune discovered by Voyager II. Link to comment Share on other sites More sharing options...
ACG52 Posted July 25, 2015 Share Posted July 25, 2015 Oh certainly. I was just commenting on how large this has grown. I've even repeated myself. Demeter - the tenth moon of Jupiter , as well as the name of the ship which brought Count Dracula to England. Link to comment Share on other sites More sharing options...
Janus Posted July 25, 2015 Share Posted July 25, 2015 RR Lyrae Star - a periodic variable star used as a standard candle in measuring distances. Link to comment Share on other sites More sharing options...
ACG52 Posted July 25, 2015 Share Posted July 25, 2015 Recombination era - the period when the temperature of the universe dropped low enough for electrons to be captured by protons, aprox 380,000 years after inflation. Link to comment Share on other sites More sharing options...
Acme Posted July 25, 2015 Share Posted July 25, 2015 Autumnal Equinox - The time in September when day & night are of equal length as the Sun crosses the celestial equator. Tip: So as not to have to reread the entire thread, use the 'Search this Topic' function to check for repeat entries before posting. Link to comment Share on other sites More sharing options...
Janus Posted July 25, 2015 Share Posted July 25, 2015 XUV - abbreviation for extreme ultraviolet. Link to comment Share on other sites More sharing options...
MigL Posted July 25, 2015 Share Posted July 25, 2015 Vacuum energy Particles and anti-particles being continuously created and annihilated may supply the energy density for the cosmological constant. Link to comment Share on other sites More sharing options...
ACG52 Posted July 25, 2015 Share Posted July 25, 2015 Ymir - a moon of Saturn. In Norse mythology Ymir was the first creature created. Link to comment Share on other sites More sharing options...
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