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 October 17
    [2]An orange elliptical ring is shown that is a disk of gas and dust
    around the star PDS 70. In the center of the disk is a fuzzy spot and
   near the inner right edge of the disk is another fuzzy spot. Please see
               the explanation for more detailed information.

                      PDS 70: Disk, Planets, and Moons
   Image Credit: [3]ALMA ([4]ESO/[5]NAOJ/[6]NRAO); [7]M. Benisty [8]et al.

   Explanation: It's not the big ring that's attracting the most
   attention. Although the big planet-forming ring around the star [9]PDS
   70 is clearly imaged and itself quite interesting. It's also not the
   planet on the right, just inside the [10]big disk, that’s being talked
   about the most. Although the planet [11]PDS 70c is a newly formed and,
   interestingly, similar in size and mass to [12]Jupiter. It's the fuzzy
   patch around the [13]planet PDS 70c that's [14]causing the commotion.
   That fuzzy patch is thought to be a [15]dusty disk that is now forming
   into moons -- and that had never been seen before. The [16]featured
   image was taken in 2021 by the [17]Atacama Large Millimeter Array
   (ALMA) of 66 [18]radio telescopes in the high [19]Atacama Desert of
   northern [20]Chile. Based on ALMA data, [21]astronomers infer that the
   moon-forming exoplanetary disk has a radius similar to our Earth's
   orbit, and may one day form three or so [22]Luna-sized moons -- not
   very different from our [23]Jupiter's [24]four.

                    Tomorrow's picture: veiled supernova
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    Authors & editors: [36]Robert Nemiroff ([37]MTU) & [38]Jerry Bonnell
                                 ([39]UMCP)
          NASA Official: Phillip Newman [40]Specific rights apply.
              [41]NASA Web Privacy Policy and Important Notices
                A service of: [42]ASD at [43]NASA / [44]GSFC,
                         [45]NASA Science Activation
                           & [46]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2310/PDS70_ALMA_1237.jpg
   3. https://www.eso.org/public/teles-instr/alma/
   4. https://www.eso.org/public/
   5. https://www.nao.ac.jp/en/
   6. https://public.nrao.edu/
   7. https://sites.google.com/view/mbenisty
   8. https://ui.adsabs.harvard.edu/abs/2021ApJ...916L...2B/abstract
   9. https://youtu.be/Cslrr2koNvU
  10. https://apod.nasa.gov/apod/ap041019.html
  11. https://en.wikipedia.org/wiki/PDS_70
  12. https://apod.nasa.gov/apod/ap190908.html
  13. https://exoplanets.nasa.gov/exoplanet-catalog/7414/pds-70-c/
  14. https://static.boredpanda.com/blog/wp-content/uploads/2014/09/animals-looking-through-the-window-201.jpg
  15. https://www.eso.org/public/news/eso2111/
  16. https://www.eso.org/public/images/eso2111b/
  17. https://en.wikipedia.org/wiki/Atacama_Large_Millimeter_Array
  18. https://apod.nasa.gov/apod/ap140526.html
  19. https://youtu.be/o5JfmFSBDgE
  20. https://en.wikipedia.org/wiki/Chile
  21. https://ui.adsabs.harvard.edu/abs/2021ApJ...916L...2B/abstract
  22. https://en.wiktionary.org/wiki/Luna#Proper_noun
  23. https://science.nasa.gov/jupiter/
  24. https://www.jpl.nasa.gov/images/the-galilean-satellites
  25. https://apod.nasa.gov/apod/ap231016.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.nasa.gov/apod.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=231017
  35. https://apod.nasa.gov/apod/ap231018.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://astrophysics.gsfc.nasa.gov/
  43. https://www.nasa.gov/
  44. https://www.nasa.gov/centers/goddard/
  45. https://science.nasa.gov/learners
  46. http://www.mtu.edu/