Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

APOD
NASA ^ | 7/06/2006 | Don Goldman

Posted on 07/06/2006 7:00:04 PM PDT by sig226

Explanation: NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. Near the center of this intriguing widefield view of interstellar gas clouds and rich star fields of the constellation Cygnus, NGC 6888 is about 5,000 light-years away. The three color composite image was created by stacking exposures through narrow band filters that transmit the light from atoms in the clouds. Hydrogen is shown as green, sulfur as red, and oxygen as blue. NGC 6888's central star is classified as a Wolf-Rayet star (WR 136) and is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of our Sun's mass every 10,000 years. Burning fuel at a prodigious rate and near the end of its stellar life, this star should ultimately go out with a bang in a spectacular supernova explosion.


TOPICS: Arts/Photography; Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: astronomy; crescentnebula; ngc6888; picture; wolfrayet; wolfrayetstar
God Bless The United States of America.

STS 121 was a great launch. If you've never seen a launch, get thee to Florida.

They're launching a Delta II on July 30th (my birthday:) ) and STS 115 on August 28th.

1 posted on 07/06/2006 7:00:05 PM PDT by sig226
[ Post Reply | Private Reply | View Replies]

To: sig226

"...this star should ultimately go out with a bang in a spectacular supernova explosion."

Just like al-Qaeda after we're finished with 'em!


2 posted on 07/20/2006 11:30:10 AM PDT by G8 Diplomat
[ Post Reply | Private Reply | To 1 | View Replies]

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson