#UMPlus - 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....
This is a brand new server run by the main developers of the project as a spin-off of mastodon.social It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!