Reference Entry

circumstellar matter

Edited by Ian Ridpath

in A Dictionary of Astronomy

Third edition


Published online February 2018 | e-ISBN: 9780191851193

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A general term for material, usually gas and dust, surrounding a star. After a star’s birth, the surrounding cloud absorbs the visible light, re-emitting it as infrared radiation. Most young stars go through a violent phase, ejecting material at speeds of hundreds of kilometres per second. When this ejected material collides with the surrounding gas, bipolar molecular outflows (...

Reference Entry.  153 words. 

Subjects: Astronomy and Astrophysics

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