Context
Gemini South Telescope (Chile) captured a high-detail image of the Butterfly Nebula (NGC 6302) for its 25th anniversary; the nebula lies 2,500–3,800 light-years away and is formed from gas ejected by a dying star (now a white dwarf).
What is a Nebula?
• Cloud of gas + dust in space.
• Can be star-forming regions or remnants of dying stars.
• Butterfly Nebula = planetary nebula.What is a White Dwarf?
• End stage of Sun-like stars.
• Extremely dense, Earth-sized stellar remnant.
• No fusion; glows from leftover heat.
• Ejects gas → forms planetary nebulae.



