APOD on Nostr: **Astronomy Picture of the Day** 22 October 2026 **The First Green Star, WD ...
**Astronomy Picture of the Day**
22 October 2026
**The First Green Star, WD J1330+6435**
Image:
Credit: Mark A. Garlick, University of Warwick
Explanation: 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
#APOD #NASA #lookUp #Astronomy
https://science.nasa.gov/image-article/apod-2026-october-22-the-first-green-star-wd-j13306435/Published at
2026-10-22 04:06:32 UTCEvent JSON
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"content": "**Astronomy Picture of the Day**\n\n22 October 2026\n\n**The First Green Star, WD J1330+6435**\n\nImage: https://assets.science.nasa.gov/dynamicimage/assets/science/cds/apod/apod/2026/october/green_wd_mark-garlick_annotated2.jpg\n\nCredit: Mark A. Garlick, University of Warwick\n\nExplanation: 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\n\n#APOD #NASA #lookUp #Astronomy\n\nhttps://science.nasa.gov/image-article/apod-2026-october-22-the-first-green-star-wd-j13306435/\n",
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