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APOD Science APOD APOD: 2026 October 22 – The… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The First Green Star, WD J1330+6435 Explanation: Star light, star bright: is there a green star out tonight? Other than the Sun , all stars are so far from Earth that they appear as points in the sky. They are mostly white, but sometimes noticeably red or blue . This color typically relates to the temperature: blue stars are hotter than red stars. What about other colors? The featured image is an illustration showing WD J1330+6435 , a white dwarf star , surrounded by an accretion disk with gas and rocks orbiting the star. White dwarfs are small, faint stars that are left over when a star like the Sun exhausts its nuclear fuel . Astronomers recently found that some white dwarf stars, despite their name, would appear yellow, green, cyan, pink, or purple . In these cases , trace elements that were accreted to these stars interact with the stellar atmosphere and shift its normally white color. But, alas! I wish I may, I wish I might, but they are too faint to see tonight … Tomorrow’s picture: eye in the sky Date October 22, 2026 Credit & Copyright Mark A. Garlick / University of Warwick Authors & editors: Cecilia Chirenti, Robert Nemiroff, Jerry Bonnell, Keighley Rockcliffe A service of: ASD at NASA / GSFC , NASA Science Activation & Michigan Tech. U. Random APOD Generator Yesterday’s Image APOD: 2026 October 21 – New Ghosts Revealed in Cassiopeia Tomorrow’s Image
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Source: NASA News. Read the original report
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Source: NASA News. Read the original report
