Friday, March 23, 2012

Scorpious, Libra and "Claw" Stars

Event Date: March 24th
Time: 5:30 AM

Brief

   Finding recognizable constellations and asterisms is a fun activity; whether someone is just becoming introduced to astronomy, or has followed it for years and is suddenly starting to recognize shapes.  Besides the Big Dipper for asterism and Leo for constellations, there is another one that caught attention long ago: Scorpious!  Looking at the stick figure below, the name fits the scorpion shape well.




Detailed

The tail, a somewhat-recognizable head, and two stars stars seen further west (right), one time represented the pinchers of the Scorpion.  Those two stars, Zubeneschhamali and Zubenelgenubi maintain their names despite the switch, as northern claw and southern claw respectively.  Although they are no longer part of the Scorpion, they are the brightest of bordering Libra the Scales.
Why were they switched?  Find out here, among other info.  For example, according to astronomical history, Libra was part of another bordering constellation before Scorpious!  Can you guess which before reading?
http://www.buzzle.com/articles/libra-constellation.html

The first image showed with the stick figure and labeled claw stars, while for the second, only the stars show, so a viewer can attempt to visualize the scorpion.  Can you?


*click on images to enlarge: courtesy of Starry Night Pro Plus, version 6.4.3, by Simulation Curriculum Corp.
The time for both images is the same.  Therefore, just look at the same part of the sky, just slightly east of south for when the constellation is almost at its highest in the sky.  This is where the Sun is located in the late fall, when seen low, and weather starts to get colder, with shorter days in the northern hemisphere.  In the southern hemisphere, this constellation is usually seen during the night very high in the sky, and where the Sun is in late spring.

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