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.

                                2022 August 7
   [2]The featured image shows a bright green meteor trail crossing before
      the distant Andromeda galaxy. Please see the explanation for more
                            detailed information.

                            Meteor before Galaxy
             Image Credit & Copyright: [3]Fritz Helmut Hemmerich

   Explanation: What's that green streak in front of the Andromeda galaxy?
   A meteor. While photographing the [4]Andromeda galaxy in 2016, near the
   peak of the [5]Perseid [6]Meteor [7]Shower, a small pebble from deep
   space [8]crossed right in front of our [9]Milky Way Galaxy's
   far-distant companion. The small [10]meteor took only a fraction of a
   second to pass through this 10-degree field. The [11]meteor flared
   several times while braking violently upon entering [12]Earth's
   atmosphere. The [13]green color was created, at least in part, by the
   meteor's gas glowing as it vaporized. Although [14]the exposure was
   timed to catch a [15]Perseid meteor, the orientation of the imaged
   streak seems a better match to a meteor from the [16]Southern Delta
   Aquariids, a [17]meteor shower that peaked a few weeks earlier. Not
   coincidentally, the [18]Perseid Meteor Shower peaks later this week,
   although [19]this year the meteors will have to outshine a [20]sky
   brightened by a nearly full moon.

                    Tomorrow's picture: celestial lagoon
     __________________________________________________________________

      [21]< | [22]Archive | [23]Submissions | [24]Index | [25]Search |
   [26]Calendar | [27]RSS | [28]Education | [29]About APOD | [30]Discuss |
                                    [31]>
     __________________________________________________________________

    Authors & editors: [32]Robert Nemiroff ([33]MTU) & [34]Jerry Bonnell
                                 ([35]UMCP)
          NASA Official: Phillip Newman [36]Specific rights apply.
              [37]NASA Web Privacy Policy and Important Notices
                A service of: [38]ASD at [39]NASA / [40]GSFC,
                         [41]NASA Science Activation
                           & [42]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2208/MeteorM31_hemmerich_1948.jpg
   3. https://www.flickr.com/people/fhhemmerich/
   4. https://apod.nasa.gov/apod/ap150830.html
   5. https://www.facebook.com/APOD.Sky/photos/?tab=album&album_id=885146358256251
   6. https://www.facebook.com/media/set/?set=a.2859552167482317&type=3
   7. https://www.facebook.com/media/set/?set=a.3855532511217606&type=3
   8. https://apod.nasa.gov/apod/ap030802.html
   9. https://www.nasa.gov/mission_pages/sunearth/news/gallery/galaxy-location.html
  10. https://en.wikipedia.org/wiki/Meteoroid#Meteors
  11. https://apod.nasa.gov/apod/ap081011.html
  12. https://www.nasa.gov/sites/default/files/images/463940main_atmosphere-layers2_full.jpg
  13. https://www.amsmeteors.org/fireballs/faqf/#5
  14. https://www.flickr.com/photos/fhhemmerich/28945882316/in/dateposted/
  15. https://apod.nasa.gov/apod/ap160808.html
  16. https://en.wikipedia.org/wiki/Southern_Delta_Aquariids
  17. https://earthsky.org/astronomy-essentials/everything-you-need-to-know-delta-aquarid-meteor-shower
  18. https://apod.nasa.gov/apod/ap180808.html
  19. https://earthsky.org/astronomy-essentials/everything-you-need-to-know-perseid-meteor-shower/
  20. https://apod.nasa.gov/apod/ap200408.html
  21. https://apod.nasa.gov/apod/ap220806.html
  22. https://apod.nasa.gov/apod/archivepix.html
  23. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  24. https://apod.nasa.gov/apod/lib/aptree.html
  25. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  26. https://apod.nasa.gov/apod/calendar/allyears.html
  27. https://apod.nasa.gov/apod.rss
  28. https://apod.nasa.gov/apod/lib/edlinks.html
  29. https://apod.nasa.gov/apod/lib/about_apod.html
  30. http://asterisk.apod.com/discuss_apod.php?date=220807
  31. https://apod.nasa.gov/apod/ap220808.html
  32. http://www.phy.mtu.edu/faculty/Nemiroff.html
  33. http://www.phy.mtu.edu/
  34. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  35. http://www.astro.umd.edu/
  36. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  37. https://www.nasa.gov/about/highlights/HP_Privacy.html
  38. https://astrophysics.gsfc.nasa.gov/
  39. https://www.nasa.gov/
  40. https://www.nasa.gov/centers/goddard/
  41. https://science.nasa.gov/learners
  42. http://www.mtu.edu/