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Neutron stars and stellar-mass black holes are the remnants of massive star explosions1. Most massive stars reside in close binary systems2, and the interplay between the companion star and the newly formed compact object has been theoretically explored3, but signatures for binarity or evidence for the formation of a compact object during a supernova explosion are still lacking. Here we report a stripped-envelope supernova, SN 2022jli, which shows 12.4-day periodic undulations during the declining light curve. Narrow Hα emission is detected in late-time spectra with concordant periodic ve...

Dark Energy Camera Captures Stunning Picture of Southern Pinwheel Galaxy in All its Glory FOLLOW US ON: With the help of Dark Energy Camera (DECam), Astro Data Archive at the Community Science and Data Center (CSDC) Program at NSF's National Optical-Infrared Astronomy Research (NOIR) Lab have captured a spectacular picture of the Southern Pinwheel galaxy. Located 15 million light-years away from Earth in the constellation Hydra, the Southern Pinwheel galaxy, also known as the Messier 83, was discovered in 1752 by French astronomer Nicolas Louis de Lacaille. The photograph was captured by a DE...