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Right ascension


Right ascension (abbreviated RA; symbol α) is the angular distance measured eastward along the celestial equator from the vernal equinox to the hour circle of  ...

Right ascension


Term: right ascension. The stars on the celestial sphere are like cities on the globe. Cities are located on the globe using latitude and longitude. Longitude says ...

What Are Celestial Coordinates - Understanding Celestial Coordinates


Jul 20, 2006 ... "Right ascension" and "declination" tell you where your telescope is pointed in the sky. But what are celestial coordinates, really?

Celestial Equatorial Coordinate System - Basic Coordinates and ...


The second coordinate in the celestial equatorial system is right ascension. It is analogous to (but not the same as) longitude. Much has Greenwich is the ...

right ascension | astronomy | Britannica.com


Right ascension, in astronomy, the east–west coordinate by which the position of a celestial body is ordinarily measured; more precisely, it is the angular ...

How To Read Sky Coordinates – One Minute Astronomer


Jun 15, 2009 ... The celestial equivalent to longitude is called right ascension. It's measured not in degrees but in “hours”, from 0h to 24h. Astronomers cooked ...

Declination and Right Ascension - AstronomyGCSE.co.uk


Declination and Right Ascension. We saw in Unit 1 how we use latitude and longitude to locate a point on the surface of the Earth. How do we locate a point in ...

Right Ascension and Declination of Sun for 2015


18 hours Universal Time corresponds to noon in the Central time zone of the United States when standard time is in effect. During the spring and summer ...

Lecture 1: Introduction to Astronomy 250


Right ascension is analogous to longitude, is usually measured in units of time: hours, minutes, seconds. The zero-point for right ascension is the Vernal ...

coordinate - Why is right ascension measured in hours? - Astronomy ...


May 20, 2014 ... When viewing star maps in Stellarium, I noticed that the meridians of the equatorial grid were denoted in hours and not degrees, and that ...

right ascension
the arc of the celestial equator measured eastward from the vernal equinox to the foot of the great circle passing through the celestial poles and a given point on the celestial sphere, expressed in degrees or hours.
Source: Dictionary.com
right ascension | Define right ascension at Dictionary.com
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