Cosmology

From yellow dwarfs to blue supergiants, stars continue to challenge astronomers' understanding of the universe

Solar wind samples reveal that Earth, the moon and Mars have different isotopic ratios than the sun, indicating some additional additional wrinkles in the planetary origin scenario. Karen Hopkin reports

A simple diagram, which celebrates its centennial this year, continues to serve as the most essential conceptual tool in stellar astrophysics

A gargantuan black hole has been spotted voraciously devouring material just 770 million years after the big bang

The galaxy cluster Abell 2744 contains so many unusual phenomena that astronomers have dubbed it "Pandora's Cluster," after the mythological box said to contain all the world's ills.

By one billion years after the big bang, galaxies and their resident black holes were already growing in tandem

A rare, superluminous kind of stellar explosion does not fit into the usual supernova categories

The Universe's biggest explosions can't be explained by current theories.

CERN physicists have forced flighty atoms of antihydrogen to stick around, potentially affording a better look at how antimatter behaves