• ES Picture of the Day 10 2020

    From Black Panther@21:1/186 to All on Thu Dec 10 11:01:26 2020
    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.


    Into the Past: Milky Way Mosaic

    December 10, 2020

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    SouthernANNO-1536x1319

    Image Creators: Tomas Slovinsky; Petr Horalek
    Summary Authors: Tomas Slovinsky; Petr Horalek

    This mosaic of the Milky Way isn’t what you might think at the
    first look. It’s actually a photographic mirror to the past. One of
    the factors that determine how the view of the night sky changes over
    the eons is the Earth’s axial precession, the gradual shift in the
    orientation of Earth’s axis of rotation that occurs in a cycle of
    approximately 25,772 years. What we're demonstrating here is how the
    visibility of particular parts of the sky change as the position of the
    celestial pole shifts.
    The top portion of this nighttime sky-view was taken in May 2020, from
    Runina, Slovak Republic (49 degrees north latitude); whereas the bottom
    portion was taken in April 2019, from the Maldives island of Soneva
    Fushi (5 degrees north latitude). This bottom portion then shows what
    could have been seen at night almost 8,000 years ago from
    present-day Slovakia, when the position of the North Celestial Pole
    was considerably different. Back in the past, even the Southern
    Cross or Crux (see annotated image) was easily visible from the
    mid-latitudes of the northern hemisphere.
    * Coordinates
    + Runina, Slovak Republic: 49.0720, 22.4013
    + Soneva Fushi, Republic of Maldives: 5.1118, 73.0787

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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

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

    https://epod.usra.edu

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