The Gum Nebula Supernova Remnant

APOD: 2022 November 29 - The Gum Nebula Supernova Remnant

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2022 November 29
The featured image shows a grand skyscape with a 
brown desert road in the foreground and a sky containing
the Milky Way galactic band complete with a large red 
glow on the right which is the dim Gum Nebula. The
LMC galaxy is also visible. 
Please see the explanation for more detailed information.

The Gum Nebula Supernova Remnant
Image Credit & Copyright: Victor Lima

Explanation: Because the Gum Nebula is the closest supernova remnant, it is actually hard to see. Spanning 40 degrees across the sky, the nebula appears so large and faint that it is easily lost in the din of a bright and complex background. The Gum Nebula is highlighted nicely in red emission toward the right of the featured wide-angle, single-image photograph taken in late May. Also visible in the frame are the Atacama Desert in Chile in the foreground, the Carina Nebula in the plane of our Milky Way galaxy running diagonally down from the upper left, and the neighboring Large Magellanic Cloud (LMC) galaxy. The Gum Nebula is so close that we are much nearer the front edge than the back edge, each measuring 450 and 1500 light years respectively. The complicated nebula lies in the direction of the constellations of Puppis and Vela. Oddly, much remains unknown about the Gum Nebula, including the timing and even number of supernova explosions that formed it.

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