Nine years ago this week I visited Yosemite National Park in the Sierra Nevada of California. I had one goal: photograph firefall. At the time, I was on a personal quest to just see this natural ...

Using the James Webb Space Telescope (JWST), scientists discovered that the Milky Way 's central supermassive black hole, Sagittarius A* (Sgr A*), is constantly streaming out flares without respite.