Firefighting crews held the line as wildfire threatened Mount Wilson; an amateur observatory built by the Tri-Valley Stargazers was not so lucky.
Colder weather might be coming, but don't pack away that telescope! You'll miss a powerful storm that's remaking Jupiter's North Temperate Belt, a returning comet, Mira on the rise, and a bright supernova in the Great Bear.
The Lick Observatory, a major astronomical institution outside San Jose, has survived a devastating California wildfire mostly unscathed.
Gravitational-wave observatories have detected the most massive black hole merger yet, and it's challenging our ideas of black hole formation.
Radio observations have turned up evidence of a cloud of hot plasma near — or even in — the solar system. But its distance estimate is still up for debate.
How would you like to see a star drop two magnitudes in the time it takes to eat dinner? Easy to do. Just check out one of these fast eclipsing binaries — they'll make your head spin.