Posted on Mar 26, 2021

APOD: 2021 March 26 - The Medusa Nebula

Maj William W. 'Bill' Price

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Good Red Friday morning, Rallypoint. Today's Astronomy Picture of the Day (APOD) is titled "The Medusa Nebula." Found in the constellation of Gemini, the Medusa Nebula is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell. Scientists went back and forth on how to classify what they were seeing: planetary nebula or supernova remnant. Using interferometry to calculate the expansion velocities and the thermal character of the observed radiation, they concluded in 1971 that it was likely a planetary nebula.

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APOD: 2021 March 26 - The Medusa Nebula

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Edited 4 y ago

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LTC Stephen F.

Posted 4 y ago

BRENDAN PERRY | Medusa

Eye Of The Hunter (1999) LYRICS: When all you have left are your memoriesAnd diamonds and pearls for companyI'll be sailing to St. Lucia on the ocean breezeW...

Thank you my friend Maj William W. 'Bill' Price for posting the NASA Astronomy Picture of the Day (APOD) is titled "The Medusa Nebula."

Image: The Medusa Nebula - Image Credit & Copyright - Josep Drudis

APOD background
"Explanation: Braided and serpentine filaments of glowing gas suggest this nebula's popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its mythological namesake, the nebula is associated with a dramatic transformation. The planetary nebula phase represents a final stage in the evolution of low mass stars like the sun as they transform themselves from red giants to hot white dwarf stars and in the process shrug off their outer layers. Ultraviolet radiation from the hot star powers the nebular glow. The Medusa's transforming star is the faint one near the center of the overall bright crescent shape. In this deep telescopic view, fainter filaments clearly extend above and right of the bright crescent region. The Medusa Nebula is estimated to be over 4 light-years across."

BRENDAN PERRY | Medusa
https://www.youtube.com/watch?v=p2TWKj4LBNk
FYI COL Mikel J. Burroughs SMSgt Lawrence McCarter Lt Col John (Jack) Christensen LTC (Join to see) SCPO Morris Ramsey MAJ Dale E. Wilson, Ph.D. Maj Bill Smith, Ph.D. Sgt Albert Castro PO1 William "Chip" Nagel SSG Stephen Rogerson SSG Samuel Kermon SSG Franklin Briant SP5 Geoffrey Vannerson SMSgt David A Asbury A1C Riley Sanders Alan K. SPC Michael Oles SR TSgt David L. Maj Marty Hogan

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LTC Stephen F.

4 y

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