color index

color index

noun Astronomy.
1.
the difference between the apparent photographic magnitude and the apparent visual magnitude of a star.
2.
the difference between the magnitudes of a star in any two spectral regions.

Origin:
1920–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To color index

00:10

00:09

00:08

00:07

00:06

00:05

00:04

00:03

00:02

00:01

Color index is always a great word to know.
So is pulsar. Does it mean:
the Goat, a zodiacal constellation between Sagittarius and Aquarius.
one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity
Dictionary.com, LLC. Copyright © 2012. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT