• ES Picture of the Day 20 2023

    From Black Panther@21:1/186 to All on Fri Jan 20 11:00:58 2023
    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.


    3-D View of DNA

    January 20, 2023


    DNA _ stereo card _Forums

    Photographer: Greg Parker

    Summary Author: Greg Parker

    Featured above is a 3-D view ( stereograph) of 2 and a half turns of
    the DNA molecule. I put together this 3-D model from a
    Cochranes of Oxford kit, and Dr. Brian May created the
    stereograph – in mid-December of 2022. A DNA molecule consists of two
    long polynucleotide strands or chains made up of four types of
    nucleotide subunits. Each such molecule contains the biological
    information responsible for making every species unique.

    You can view the stereograph by:
    1. Using the Cross-Eyed method
    2. Using 3D prism glasses
    3. Using B rian May’s OWL Stereoscope



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    More...

    Animal Links

    * Animal Diversity Web
    * ARKive
    * BirdLife International
    * Bug Guide
    * Discover Life
    * Integrated Taxonomic Information System
    * Microbial Life Resources
    Earth Science Picture of the Day is a service of the
    -
    Universities Space Research Association.

    https://epod.usra.edu

    --- up 46 weeks, 4 days, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)
  • From Black Panther@21:1/186 to All on Mon Feb 20 11:01:26 2023
    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.


    High Tatras Halo Display

    February 20, 2023


    Winter_Sun_halo_Slovakia

    Photographer: Viktor Belicak
    Summary Authors: Viktor Belicak; Jim Foster
    Featured above is a panorama of an attention-getting halo display I
    captured from the village of Zdiar in the very eastern part of the High
    Tatras Mountains of Slovakia. It was taken just after sunrise on
    December 18, 2022. The morning air was bitter cold -- temperature about
    0 degrees F (-18 C). Sunlight shining through ice crystals
    suspended in the air, within 100 m or so of the surface, created this
    atmospheric wonder.

    Easily visible here are the 22-degree halo, parhelia (sundogs)
    and upper tangent arc (at top of 22-degree halo). Other arcs were
    visible as the Sun rose higher. Displays such as this can on occasion
    be observed at ski resorts when snow making equipment is used
    to augment the natural snowpack. However, high winds lifting ice
    crystals from the surface into the air or crystals free-falling
    through the lower atmosphere may also result in these displays.

    Photo details: Panorama made of 6 photos; ISO 100; 18mm; f 8; 1/400
    second exposure.

    Zdiar, High Tatras, Slovakia Coordinates: 49.2713, 20.2734


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    More...

    Atmospheric Effects Links

    * Atmospheric Optics
    * Optic Picture of Day: Gruppo Astrofili Galileo Galilei
    * Color and Light in Nature
    * The Colors of Twillight and Sunset
    * Refraction Index
    * Image Gallery: Atmospheric Effects
    * What is a Rainbow?

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

    https://epod.usra.edu

    --- up 51 weeks, 21 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)