Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

Time under dark skies is precious, and for a lot of us, getting out to those sites can be tough. When we do, often we end up ...

The oldest naked eye star yet found still provides stellar theorists with key data on the earliest epochs of our Milky Way.

Pleasant Valley graduate Katie Melbourne has worked with NASA and Ball Aerospace, but got her start with the Popular ...

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show!

Researchers made a fascinating discovery at the heart of our galaxy: "strange filaments" driving a cycle of gas emissions and ...

ALMA has revealed evidence of a new type of slim, filamentary structure that drives cycles of depletion and replenishment. At ...

Researchers have spent the past few years watching a black hole re-awaken roughly 300 million light-years away from Earth.

"This rare event provides an opportunity for astronomers to observe a black hole's behavior in real time," said astronomer Lorena Hernández-García.

The black hole at the heart of galaxy SDSS1335+0728, located 300 million light-years away, was quiet for decades as it ...

Astronomer Charles Steinhardt said most stars we see "might have formed under different conditions than we previously believed." ...

Venus is very bright right now and can be seen with the naked eye just after sunset. Using a telescope, backyard astronomers ...