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. 2023 February 16 [2]See Explanation. Clicking on the picture will download the highest resolution version available. The Hydra Cluster of Galaxies Image Credit & [3]Copyright: [4]Marco Lorenzi, Angus Lau, Tommy Tse Text: [5]ChatGPT (apologies to [6]Edgar Allen Poe) Explanation: Once upon a midnight dreary, while I pondered weak and weary, O'er volumes of astronomy and forgotten lore, I stumbled [7]upon this snapshot, cosmic and eerie, A sight that filled my heart with awe and more. Two stars, like sentinels, anchored the foreground, Of our Milky Way galaxy, a sight to behold, Beyond them, a cluster of Hydra, galaxies abound, 100 million light-years away, [8]a story to be told. Three large galaxies, ellipticals and a spiral blue, Dominant and grand, each 150,000 light-years wide, But it was the overlapping pair that caught my view, Cataloged as NGC 3314, a sight I cannot hide. Abell 1060, the [9]Hydra galaxy cluster's name, One of three large galaxy clusters close to our Milky Way, A universe bound by gravity, a celestial game, Where clusters align over larger scales, I cannot sway. At a distance of 100 million light-years, this snapshot's size, 1.3 million light-years across, a cosmic delight, A momentary glimpse into [10]the universe's guise, But even this shall fade, and be nevermore in sight. Tomorrow's picture: formerly 2023 CX1 __________________________________________________________________ [11]< | [12]Archive | [13]Submissions | [14]Index | [15]Search | [16]Calendar | [17]RSS | [18]Education | [19]About APOD | [20]Discuss | [21]> __________________________________________________________________ Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell ([25]UMCP) NASA Official: Phillip Newman [26]Specific rights apply. [27]NASA Web Privacy Policy and Important Notices A service of: [28]ASD at [29]NASA / [30]GSFC, [31]NASA Science Activation & [32]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2302/ABELL1060_LRGB_NASA.jpg 3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 4. https://www.glitteringlights.com/ 5. https://openai.com/blog/chatgpt/ 6. https://www.poets.org/poet/edgar-allan-poe 7. https://apod.nasa.gov/apod/ap120512.html 8. https://www.nasa.gov/feature/goddard/2023/nasas-curious-universe-podcast-returns-for-season-five/ 9. https://en.wikipedia.org/wiki/Hydra_Cluster 10. https://www.nasa.gov/feature/goddard/2023/nasa-s-webb-uncovers-new-details-in-pandora-s-cluster 11. https://apod.nasa.gov/apod/ap230215.html 12. https://apod.nasa.gov/apod/archivepix.html 13. https://apod.nasa.gov/apod/lib/apsubmit2015.html 14. https://apod.nasa.gov/apod/lib/aptree.html 15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 16. https://apod.nasa.gov/apod/calendar/allyears.html 17. https://apod.nasa.gov/apod.rss 18. https://apod.nasa.gov/apod/lib/edlinks.html 19. https://apod.nasa.gov/apod/lib/about_apod.html 20. http://asterisk.apod.com/discuss_apod.php?date=230216 21. https://apod.nasa.gov/apod/ap230217.html 22. http://www.phy.mtu.edu/faculty/Nemiroff.html 23. http://www.phy.mtu.edu/ 24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 25. http://www.astro.umd.edu/ 26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 27. https://www.nasa.gov/about/highlights/HP_Privacy.html 28. https://astrophysics.gsfc.nasa.gov/ 29. https://www.nasa.gov/ 30. https://www.nasa.gov/centers/goddard/ 31. https://science.nasa.gov/learners 32. http://www.mtu.edu/