 EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes
and phenomena which shape our planet and our lives. EPOD will collect and
archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


 EPOD 20th - Observing the Moon on the Same Day from the Northern and
Southern Hemispheres

   September 17, 2020

    Freitas Moon-Venus-Copenhagen-Mario(3)

    Frietas Moon-Venus-Curitiba-SandroColetti (1)

    Freitas-Twilight-20h45min-UTC-July-15-2018 (1)

    November 2018 Viewer's Choice We’re celebrating 20 years of Earth
   Science Picture of the Day during the month of September! Today’s photo
   features a popular EPOD from the past. Thanks to all of our followers
   (on the blog, Facebook, Instagram and Twitter) for supporting us.
   Thanks also to all of you who’ve submitted your photos. We’re most
   appreciative. This EPOD was originally published November 22, 2018.

   Photographers:  Mario Freitas; Sandro Coletti
   Summary Author:  Mario Freitas

   The shooting times of the pair of photos above differ by less than one
   hour, but their locations were more than 10,000 kilometers apart.
   During  civil twilight on July 15, 2018, the same Moon-Venus
    conjunction was observed by amateur astronomers in  Copenhagen,
   Denmark and  Curitiba, Brazil. If we consider that both celestial
   bodies lie close to the  ecliptic plane, the  Earth’s roundness
   provides that the arc connecting  Venus to the  waxing crescent
   Moon appears almost horizontal in Copenhagen, but is strongly tilted
   upwards in Curitiba.

   Fortunately, meteorological conditions were favorable for observing the
   sky at both locations -- shooting times were 20:44 for Copenhagen and
   21:26 UTC for Curitiba. The simulation by  Google Earth makes it
   clear that the way the  Earth’s axis tilts allows twilight times to
   be simultaneous in both cities. Although they differ by 60 degrees in
    longitude and 80 degrees in  latitude, the  geodesic line
   between Copenhagen and Curitiba eventually coincides with the  solar
   terminator. Note that the planet  Mercury is also visible in second
   picture (at lower left of  the Moon).
     * Coordinates
          + Curitiba, Brazil:  -25.4809, -49.3044
          + Copenhagen, Denmark:  55.676111, 12.568333

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Night Sky Links

     *  Space Weather Live
     *  Space Weather Live Forum
     *  About the Moon
     *  American Meteor Society
     *  Arbeitskreises Meteore e.V.
     *  Global City Lights
     *  Heavens Above Home Page
     *  The International Meteor Organization
     *  Lunar and Planetary Institute
     *  MoonConnection
     *  NASA Eclipse Web Page
     *  Understanding The Moon Phases

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   Earth Science Picture of the Day is a service of the  Universities
   Space Research Association.

https://epod.usra.edu
 
