Astronomy Picture of the Day
Time 2020-09-29 06:02:45Web Name: Astronomy Picture of the Day
WebSite: http://apod.nasa.gov
ID:63652
Keywords:
Picture,Astronomy,of,Description:
Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer.2020 September 28 Image Credit: ESA/Hubble & NASA, W. Blair; Acknowledgement: Leo Shatz Explanation: What lies at the edge of an expanding supernova? Subtle and delicate in appearance, these ribbons of shocked interstellar gas are part of a blast wave at the expanding edge of a violent stellar explosion that would have been easily visible to humans during the late stone age, about 20,000 years ago. The featured image was recorded by the Hubble Space Telescope and is a closeup of the outer edge of a supernova remnant known as the Cygnus Loop or Veil Nebula. The filamentary shock front is moving toward the top of the frame at about 170 kilometers per second, while glowing in light emitted by atoms of excited hydrogen gas. The distances to stars thought to be interacting with the Cygnus Loop have recently been found by the Gaia mission to be about 2400 light years distant. The whole Cygnus Loop spans six full Moons across the sky, corresponding to about 130 light years, and parts can be seen with a small telescope toward the constellation of the Swan (Cygnus). Tomorrow's picture: tilted planets | Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA /GSFC& Michigan Tech. U.<<< Thank you for your visit >>>
A different astronomy and space science related image is featured each day, along with a brief explanation.Websites to related : Central Quebec School Board - 登
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