Nearby Words
ephemeris time
Free Ephemeris www.ask.com/ Look Up Free Ephemeris; Get Trusted Answers on Ask.com!
California Clock california.local.com/ Find clock here. We offer local search in your state
Ephemeris Time www.5earch.com/Ephemeris+Time Looking for Ephemeris Time? Find it here!
Ads
ephemeris time
noun Astronomy.
time measured by the orbital movements of the earth, the moon, and the planets.
Origin:
1945–50
1945–50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
|
Link To ephemeris time
00:10
00:09
00:08
00:07
00:06
00:05
00:04
00:03
00:02
00:01
Ephemeris time
is always a great word to know.
So is eclipse. Does it mean:
| the obscuring of the light of the moon by the intervention of the earth between it and the sun, a lunar eclipse, or the obscuring of the light of the sun by the intervention of the moon between it and a point on the earth, a solar eclipse |
| a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue |
Collins
World English Dictionary
| ephemeris time | |
| —n | |
| time that is based on the orbit of the earth around the sun rather than the axial rotation of the earth, one ephemeris second being 1/31 556 925.9747 of the tropical year 1900. It was used from 1960 to 1983 as an astronomical timescale but has been replaced by terrestrial dynamical time and barycentric dynamic time | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
| ephemeris time
A highly accurate astronomical system for the measurement of time based in theory on the period of Earth's orbit, but in practice relying on lunar observations and an accurate lunar ephemeris so as to not be subject to the irregularities of Earth's rotation. The year 1900 CE is considered a standard year, containing 31,556,925.9747 seconds of ephemeris time. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Word Dynamo Rating For Ephemeris time
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
