Cosmic radiation occasionally contains enormous amounts of energy, but we don’t know why or where this radiation comes from.

In a major breakthrough for astronomy, scientists have captured an incredibly detailed image of a powerful jet shooting out from a distant black hole. This was made possible by connecting some of the ...

The search for dark matter requires all the best models, theories, and ideas we can throw at it. A new paper by Julia Monika ...

Plus: President Donald Trump spoke with both Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy ...

Scientists believe the Milky Way contains up to 400 billion stars and at least as many planets. The largest galaxy known, IC 1101, has more than 100 trillion stars. Step outside on a clear night and ...

I’ve spent much of my long life studying — and trying to understand — the history of the universe. Along the way, I have been constantly reminded that science is essentially international: Science ...

New research is shedding light on what researchers call "lite" intermediate-mass black holes, which are smaller, but still ...

Some physicists think our reality is a kind of cosmic hologram, with space, time, and gravity as manifestations of a ...

Gravitational waves stretch and squeeze the fabric of space and time itself. When space/time is squeezed, pulsar pulses ...

The Big Bang model begins with a point of infinite density where the laws of physics break down. This is a deep theoretical problem that suggests the beginning of the Universe is not fully understood, ...

The Hubble Space Telescope is making waves again, this time for a snapshot of a spiral galaxy located 250 million light-years ...

"We would need to consider the possibility that the source was created (or trapped as a primordial black hole) by a highly ...