https://science.nasa.gov/photojournal/weighing-in-on-the-dumbbell-nebula/
Weighing in on the Dumbbell Nebula - NASA Science
Aug 10, 2011 - The 'Dumbbell nebula,' also known as Messier 27, pumps out infrared light in this image from NASA's Spitzer Space Telescope. Planetary nebulae are now known to...
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