Glossary term: Sirius

Description: Sirius, also called the Dog Star or Alpha Canis Majoris, is the star that appears brightest in the night sky to our eyes. It is located at a distance of 8.6 light years from us in the constellation Canis Major near Orion. The bright star that is visible to us is Sirius A, a star of spectral type A. Sirius A has a gravitationally bound companion, Sirius B, which is a white dwarf star that is very faint in visible light but very bright in X-rays. Sirius B is too faint and too close to Sirius A to be seen with the naked eye.

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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".