- Stingray planetary nebula
The planetary nebula nicknamed Stingray and cataloged as Henize 3-1357, appears to have changed shape and vanished in the last twenty years. Witnessing such a rapid rate of change in a planetary nebula is extremely rare. The upper image shows how the Hubble Space Telescope observed this nebula in 2016, while the lower image makes a comparison with an image of the same nebula photographed with the same instrument in 1996, an interval....

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