Hubble Telescope Spots Enormous Elliptical Galaxy Surrounded By Mysterious Shells - Space.com

Shells are often seen around stars as planetary nebulae, but an entire galaxy? Well NASA saw it, the pictures prove it, so you gotta believe it. But why? There are a couple of hypotheses and Samantha Mathewson lays them out for consideration. Too bad they aren't megastructures, or big dumb objects, since those would be proof positive that humanity isn't alone in the cosmos. As earthly SETI programs soldier on, Jes Kristian Jørgensen and pals reckon Planets Of Binary Stars Are Possible Homes For Alien Life. In short the mechanics for planetbuilding exist around binary stars and Jes elaborates the logic behind his maverick proposal. While the closest star to Earth which is not the sun isn't in a binary system, it does orbit around one. As we wait for the James Webb Telescope to get up-to-speed, Microlensing Yields New Data On Proxima Centauri's orbit and interactions proving some long-held suppositions about its origin and relation to Alpha Centauri A and B. (CS)

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from THE ANOMALIST https://bit.ly/3lUF6Tw