Subj : Daily APOD Report
To   : All
From : Alan Ianson
Date : Sun Nov 17 2024 00:19:32

                        Astronomy Picture of the Day

    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.

                              2024 November 17
      A starfield is dominated by light brown dust. In the middle is a
    parabolic gas cloud opening toward the lower right. A bright star is
   near the center at the apex of the parabolic gas cloud. Please see the
                 explanation for more detailed information.

                      LDN 1471: A Windblown Star Cavity
     Image Credit: Hubble, NASA, ESA; Processing & License: Judy Schmidt

   Explanation: What is the cause of this unusual parabolic structure?
   This illuminated cavity, known as LDN 1471, was created by a newly
   forming star, seen as the bright source at the peak of the parabola.
   This protostar is experiencing a stellar outflow which is then
   interacting with the surrounding material in the Perseus Molecular
   Cloud, causing it to brighten. We see only one side of the cavity --
   the other side is hidden by dark dust. The parabolic shape is caused by
   the widening of the stellar-wind blown cavity over time. Two additional
   structures can also be seen either side of the protostar; these are
   known as Herbig-Haro objects, again caused by the interaction of the
   outflow with the surrounding material. What causes the striations on
   the cavity walls, though, remains unknown. The featured image was taken
   by NASA and ESACÇÖs Hubble Space Telescope after an original detection by
   the Spitzer Space Telescope.

                Explore Your Universe: Random APOD Generator
                         Tomorrow's picture: Bok Man
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       Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
            NASA Official: Amber Straughn Specific rights apply.
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                           NASA Science Activation
                             & Michigan Tech. U.

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