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| ASTRONOMY GUIDE: | | | | | | 
|  |  EQUIPMENT GUIDE |  | < back to Glossary Astronomy & Telescopes Glossary - VVisual binary star - A binary star pair that are far enough apart to be visible as separate objects. Visual limiting magnitude - The magnitude of the dimmest star that you can see overhead. Visual magnitude - A measure of the brightness of an object as seen from Earth. The lower the number, the brighter the object. Negative numbers indicate extreme brightness. |  |