Astronomy Picture of the Day [1]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. 2026 February 23 [2]A cluster of blue stars is seen against a starfield of brown and clumpy dust. The stars illuminate some of the nearby dust which causes the dust to glow blue. Please see the explanation for more detailed information. Pleiades: The Seven Sisters Star Cluster Image Credit & Copyright: [3]Kamil Fiedosiuk Explanation: Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it as large and clear as this. Perhaps the most famous star cluster on the sky, the bright stars of the [4]Pleiades can be seen with the unaided eye even from the depths of a [5]light-polluted city. With a long exposure from a dark location, though, the dust cloud surrounding the [6]Pleiades star [7]cluster becomes very evident. The [8]featured 18-hour exposure, taken from [9]Bory Tucholskie, [10]Poland covers a sky area several times the size of the full [11]moon. Also known as the [12]Seven Sisters and [13]M45, [14]the Pleiades lies about 400 [15]light years away toward the constellation of the Bull ([16]Taurus). A [17]common legend with a [18]modern twist is that one of the brighter stars faded since the cluster was named, leaving only [19]six of the sister stars visible to the unaided eye. The actual number of [20]Pleiades stars visible, however, may be more or less than seven, depending on the [21]darkness of the surrounding sky and the [22]clarity of the observer's eyesight. Sky Surprise: [23]What picture did APOD feature on your birthday? (after 1995) Tomorrow's picture: [24]opera planets __________________________________________________________________ [25]< | [26]Archive | [27]Submissions | [28]Index | [29]Search | [30]Calendar | [31]RSS | [32]Education | [33]About APOD | [34]Discuss | [35]> __________________________________________________________________ Authors & editors: [36]Robert Nemiroff ([37]MTU) & [38]Jerry Bonnell ([39]UMCP) NASA Official: Amber Straughn [40]Specific rights apply. [41]NASA Web Privacy, [42]Accessibility, [43]Notices; A service of: [44]ASD at [45]NASA / [46]GSFC, [47]NASA Science Activation & [48]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2602/Pleiades_Fiedosiuk_2200.jpg 3. https://app.astrobin.com/u/count.neverest 4. https://en.wikipedia.org/wiki/Pleiades 5. https://apod.nasa.gov/apod/ap200408.html 6. https://apod.nasa.gov/apod/ap210406.html 7. http://asterisk.apod.com/viewtopic.php?f=24&t=18009 8. https://app.astrobin.com/i/mrcht6 9. https://youtu.be/cCPooWUoVSU 10. https://en.wikipedia.org/wiki/Poland 11. https://science.nasa.gov/moon/ 12. https://theconversation.com/the-worlds-oldest-story-astronomers-say-global-myths-about-seven-sisters-stars-may-reach-back-100-000-years-151568 13. https://apod.nasa.gov/apod/ap250305.html 14. https://www.skyandtelescope.com/astronomy-news/observing-news/many-pleiades-can-see10222014/ 15. https://spaceplace.nasa.gov/light-year/en/ 16. https://en.wikipedia.org/wiki/Taurus_(constellation) 17. https://arxiv.org/abs/0810.1592 18. http://kencroswell.com/GD50.html 19. https://i.pinimg.com/originals/a9/b3/21/a9b321789591e2839c773669a5aa03bd.jpg 20. http://www.youtube.com/watch?v=p6prI0Zfw80 21. https://apod.nasa.gov/apod/ap010827.html 22. http://en.wikipedia.org/wiki/File:Snellen_chart.svg 23. https://apod.nasa.gov/apod/calendar/allyears.html 24. https://apod.nasa.gov/apod/ap260224.html 25. https://apod.nasa.gov/apod/ap260222.html 26. https://apod.nasa.gov/apod/archivepix.html 27. https://apod.nasa.gov/apod/lib/apsubmit2015.html 28. https://apod.nasa.gov/apod/lib/aptree.html 29. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 30. https://apod.nasa.gov/apod/calendar/allyears.html 31. https://apod.com/feed.rss 32. https://apod.nasa.gov/apod/lib/edlinks.html 33. https://apod.nasa.gov/apod/lib/about_apod.html 34. https://asterisk.apod.com/discuss_apod.php?date=260223 35. https://apod.nasa.gov/apod/ap260224.html 36. http://www.phy.mtu.edu/faculty/Nemiroff.html 37. http://www.phy.mtu.edu/ 38. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 39. http://www.astro.umd.edu/ 40. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 41. https://www.nasa.gov/about/highlights/HP_Privacy.html 42. https://www.nasa.gov/general/accessibility/ 43. https://www.nasa.gov/privacy/ 44. https://astrophysics.gsfc.nasa.gov/ 45. https://www.nasa.gov/ 46. https://www.nasa.gov/centers/goddard/ 47. https://science.nasa.gov/learners 48. http://www.mtu.edu/