Posted on Oct 17, 2020

APOD: 2020 October 17 - Cygnus: Bubble and Crescent

Maj William W. 'Bill' Price

1.07K

105

17

23

0

Good morning, Rallypoint. Today's Astronomy Picture of the Day (APOD) is titled "Cygnus: Bubble and Crescent." Do you see what looks like an optical artifact in the bottom left corner? That's (yet another) planetary nebula (PN). It was only discovered only recently (some sources date back to 2007), and has the designation PN G75.5+1.7. It is known as the Soap Bubble Nebula. The Crescent Nebula (NGC 6888) is the larger object in the upper left. Its source is a central Wolf-Rayet star, WR-136. Recall that a Wolf-Rayet (WR) star exhibits spectra that indicate very high surface enhancement of heavy elements and a depletion of hydrogen. Their surface temperatures range from 30,000 K to around 210,000 K, hotter than almost all other stars. Both nebulae are in the constellation Cygnus (The Swan) and lie about 5,000 light years from Earth.

APOD: 2020 October 17 - Cygnus: Bubble and Crescent

Posted from apod.nasa.gov

Posted in these groups: A391a453

NASA

Space

Science

Photography Astronomy logo

Astronomy

Posted 4 y ago

Responses: 11

12

0

LTC Stephen F.

Edited 4 y ago

Posted 4 y ago

Ly O Lay Ale Loya (Circle Dance) ~ Native Song

May the stars carry your sadness away, May the flowers fill your heart with beauty, May hope forever wipe away your tears. And, above all, may the silence ma...

Thank you my friend Maj William W. 'Bill' Price for posting the NASA Astronomy Picture of the Day (APOD) is titled "Cygnus: Bubble and Crescent."

The capability to present a relatively clear view of a nebula 25 light-years across at this scale testifies to creativity of mankind and the amazing design of the heavens by God

Image - Cygnus: Bubble and Crescent - Image Credit & Copyright - Wissam Ayoub

APOD Background
"Explanation: These clouds of gas and dust drift through rich star fields along the plane of our Milky Way Galaxy toward the high flying constellation Cygnus. Caught within the telescopic field of view are the Soap Bubble (lower left) and the Crescent Nebula (upper right). Both were formed at a final phase in the life of a star. Also known as NGC 6888, the Crescent was shaped as its bright, central massive Wolf-Rayet star, WR 136, shed its outer envelope in a strong stellar wind. Burning through fuel at a prodigious rate, WR 136 is near the end of a short life that should finish in a spectacular supernova explosion. Discovered in 2013, the Soap Bubble Nebula is likely a planetary nebula, the final shroud of a lower mass, long-lived, sun-like star destined to become a slowly cooling white dwarf. Both stellar shrouds are 5,000 light-years or so distant. The larger Crescent Nebula is around 25 light-years across."

Ly O Lay Ale Loya (Circle Dance) ~ Native Song
May the stars carry your sadness away,
May the flowers fill your heart with beauty,
May hope forever wipe away your tears.
And, above all, may the silence make you strong !
https://www.youtube.com/watch?v=9UglUjiJifA

FYI Maj Robert Thornton Lt Col Charlie Brown COL Mikel J. Burroughs Sgt (Join to see) PO1 William "Chip" Nagel Maj Bill Smith, Ph.D. Lt Col John (Jack) Christensen MSG Felipe De Leon Brown Sgt Vance Bonds MAJ Dale E. Wilson, Ph.D. TSgt David L. SPC Nancy Greene PO2 (Join to see) SPC Margaret Higgins Maj Marty Hogan PO2 Frederick Dunn PO3 Phyllis Maynard CPT Gurinder (Gene) Rana

(12)

Comment

(0)