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 February 21
    [2]The featured image shows barred spiral galaxy NGC 6217 as captured
     by the Hubble Space Telescope. Please see the explanation for more
                            detailed information.

                        Barred Spiral Galaxy NGC 6217
        Image Credit: [3]NASA, [4]ESA, and the [5]Hubble SM4 ERO Team

   Explanation: Many spiral galaxies have bars across their centers. Even
   our own [6]Milky Way Galaxy is thought to have a [7]modest central bar.
   Prominently barred spiral galaxy NGC 6217, [8]featured here, was
   captured in spectacular detail in this image taken by the [9]Advanced
   Camera for Surveys on the orbiting [10]Hubble Space Telescope in 2009.
   Visible are dark filamentary [11]dust lanes, young [12]clusters of
   bright blue stars, red [13]emission nebulas of glowing hydrogen gas, a
   [14]long bar of stars across the center, and a bright [15]active
   nucleus that likely houses a supermassive [16]black hole. Light takes
   about 60 million years to reach us from [17]NGC 6217, which spans about
   30,000 [18]light years across and can be found toward the
   [19]constellation of the Little Bear ([20]Ursa Minor).

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                   Tomorrow's picture: quasar illustrated
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    Authors & editors: [57]Robert Nemiroff ([58]MTU) & [59]Jerry Bonnell
                                 ([60]UMCP)
          NASA Official: Phillip Newman [61]Specific rights apply.
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                A service of: [63]ASD at [64]NASA / [65]GSFC
                           & [66]Michigan Tech. U.

References

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   4. https://esahubble.org/
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   6. https://solarsystem.nasa.gov/resources/285/the-milky-way-galaxy/
   7. https://apod.nasa.gov/apod/ap050825.html
   8. https://esahubble.org/images/heic0910s/
   9. https://www.nasa.gov/content/hubble-space-telescope-advanced-camera-for-surveys
  10. https://en.wikipedia.org/wiki/Hubble_Space_Telescope
  11. https://apod.nasa.gov/apod/ap200222.html
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  13. https://apod.nasa.gov/apod/emission_nebulae.html
  14. https://media.istockphoto.com/photos/jumping-cat-picture-id1170788665
  15. https://en.wikipedia.org/wiki/Active_galactic_nucleus
  16. http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html
  17. https://ui.adsabs.harvard.edu/abs/2001A&A...376..393P/abstract
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