In a new paper appearing in Physical Review D, physicists describe how energy can be extracted from black holes.

In a new paper appearing in Physical Review D, physicists describe how energy can be extracted from black holes.
We’ve managed to find a star that is regularly flaring up as it swoops by its black hole and is being called “Old Faithful” as it flashes every 114 days like clockwork.
Researchers presented the results of combing through myriad catalogs of galaxy images in optical, infrared, and X-ray light to find triple systems.
Climate change increases erosion rates, breaks up rocks, causes sea level rise, and could be a boon for the growth of truffles.
The USGS has uploaded a fantastic video of a lava dome forming from the lava lake inlet of Halema’uma’u crater earlier in the year.
What’s Up: Mercury and Jupiter get close, the Moon puts on its horns, and Orion is ready to shine high in the sky. Plus how to find asteroid 16 Psyche.
Reviewers looking at the progress being made by the InSight mission on Mars and the Juno mission at Jupiter have determined both science missions are going well and received extensions.
Citizen scientists from the Backyard Worlds: Planet 9 project delved into the DESI Legacy Surveys data they were provided and helped put together a 3D map of nearby brown dwarfs.
The DESI Legacy Imaging Surveys have doubled the number of known
gravitational lenses.
The Dark Energy Spectroscopic Instrument (DESI) is a brand-new instrument installed at the Kitt Peak National Observatory (KPNO). It’s ready to come online, and it follows on the heels of the DESI Legacy Imaging Surveys.