A star is a physical system
By A sky worth slowing for · myAudience

myAudience · AI-generated illustration · Original generated illustration; not documentary evidence
Stars are enormous objects whose light comes from processes in their interiors. Their masses and stages of evolution help explain different appearances and lifetimes. The lovely colors in an astronomical image may involve particular wavelengths or processing; they are not always what an unaided eye would see. Our cover is an AI-generated space illustration, not telescope data. Ask what was measured before interpreting a beautiful picture.