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Astronomy Definitions and Factiods

 

Astronomy Definitions 3

 

Magnitude

A measure of the faintness of a star. Magnitude 6.0 is the faintest we can ordinarily see, and the average of the twenty brightest stars defines magnitude 1.0. Each magnitude step is a factor of 2.5 in brightness.

Meridian

An observer's meridian passes through his zenith at the celestial poles. It is his north-south line. Meteor A flash of light produced by a particle in the atmosphere moving so rapidly that it becomes luminous.

Meteorite

A rock that once looked like a meteor. Morning Sky That half of the celestial sphere containing the sun.

 

 

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