The circumgalactic medium (CGM) referred to in the study is best described as
- A.The dense core of a galaxy where stars are packed together
- B.The faint envelope of gas surrounding a galaxy beyond its disc
- C.The ring of dust that forms the spiral arms of a galaxy
- D.The region inside the event horizon of a black hole
Show answer
The study describes the circumgalactic medium as a diffuse, ghostly reservoir of gas that lies past the edge of the stellar disc and spreads out to between ten and twenty times the size of the galaxy, and this reservoir supplies the fuel from which stars are eventually made.
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