                        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.

                                2022 July 15

                              Lubovna Full Moon
                Petr Horalek / Institute of Physics in Opava

   Explanation: On July 13 this well-planned telephoto view recorded a
   Full Moon rising over Lubovna Castle in eastern Slovakia. The
   photographer was about 3 kilometers from the castle walls and about
   357,000 kilometers from this Full Moon near perigee, the closest point
   in its elliptical orbit. Known to some as supermoons, full moons near
   perigee are a little brighter and larger in planet Earth's sky when
   compared to full moons that occur near the average lunar distance of
   around 384,000 kilometers. Of course any Full Moon near the horizon can
   show the effects of refraction over a long sight-line through dense
   clear atmosphere. In this image, atmospheric refraction creates the
   slight green flash framed by thin clouds near the top, with a ragged
   red rim along the bottom edge of July's perigee Full Moon.

                    Tomorrow's picture: Clavius and Tycho
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       Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
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