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Glossary term: Magnitude

Description: In astronomy, magnitude refers to the measure of brightness of a celestial body, i.e. stars. Magnitude on its own has no units and measures the brightness of an object. A smaller number means that the object is brighter and a larger number means fainter. Magnitude is a logarithmic scale meaning that a star of magnitude zero is 100 times brighter than a star of magnitude 5.

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Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".