Less humorously known as Sharpless 2-240, this object is the remnant from
a supernova that exploded about 40,000 years ago, scattering heavy
elements into the universe for recycling in an expanding spherical
shell. Though extremely dim and difficult to see, this object has an
apparent diameter in the sky equal to 6 full moons placed side by side.
It is, in fact, 160 light years across, and about 3,000 light years from
earth. It is located in the constellation Taurus, in the area between Taurus'
horns, Gemini's feet, and the constellation Auriga.

This image was chosen as a finalist in "Air and Space Smithsonian" magazine's
2017 photo contest in the "Astronomy" category:
https://www.airspacemag.com/photocontest/archive/2017

Image Data:
Telescope: Takahashi FSQ 106
Camera: SBIG STL-11000
Exposure: 13 hours (hydrogen alpha 8 hours, RGB 5 hours)