A circumstellar envelope (CSE) is a part of a star that has a roughly spherical shape and is not gravitationally bound to the star core. Usually circumstellar envelopes are formed from the dense stellar wind, or they are present before the formation of the star.^[1] Circumstellar envelopes of old stars (Mira variables and OH/IR stars) eventually evolve into protoplanetary nebulae, and circumstellar envelopes of young stellar objects evolve into circumstellar discs.^[2]

• Circumstellar envelopes of AGB stars
• Circumstellar envelopes around young stellar objects

• Circumstellar dust
• Common envelopes
• Stellar evolution

• The Structure and Evolution of Envelopes and Disks in Young Stellar Systems Archived 2013-07-21 at the Wayback Machine

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