astrophysics

Two women made allegations against the astrophysicist and "Cosmos" host in a newly published report.
A professor broke down why Trump's wild brag can't possibly be true.
The famed astrophysicist looks at the evidence.
The big question: Did they leave artifacts behind for us to find?
He started writing it just weeks after Britain entered WWII.
Astronomers watch the galactic equivalent of a dog with a bone.
As astrophysicist Adam Riess explains in this fascinating Q&A, the cosmos will double in size 800 million years sooner than predicted.
A new study could overhaul our understanding of these cosmic monsters.
Here's the answer.
The discovery may usher in a new era of astronomy and answer big questions about black holes.