When astronomers look deep into the early universe, the expectation is simple. You should see young galaxies still assembling ...

Astronomers found a young galaxy cluster with unexpectedly hot gas, suggesting cosmic structures formed faster than once ...

Nearly all stars are found inside or around galaxies, but there are ways for stars to escape into intergalactic space.

Astronomers have uncovered a gargantuan black hole that appears to sit almost alone in space, with hardly any stars around it ...

A galaxy cluster in the early universe is 10 times hotter than it ought to be, which may reshape how we think these enormous ...

The galaxy cluster appears hotter and more mature than it should for its young age, challenging what we think we know about ...

A wobbling jet from a giant, voracious black hole is suppressing star formation in a distant galaxy—and astronomers have ...

"You think that these things should not exist together, but there it is right in front of you, and it’s undeniable," ...

Astronomers describe the discovery of the largest-known stream of super-heated gas in the universe ejecting from a nearby ...

Hints of impossibly bright, massive objects in the infant universe have forced astronomers to rethink how the first cosmic ...

Measuring the energy of hot gas within a remote group of galaxies reinforces the importance of giant black holes in forming ...

The platypus is one of evolution's lovable, oddball animals. The creature seems to defy well-understood rules of biology by ...