Observations of ultra-massive galaxies, each containing more than 100 billion stars, show that less than 2 billion years ...

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

New telescope instruments now reveal distant galaxies in detail, reshaping how astronomers map dark matter, star formation, ...

Look up at the sky on a clear night, and you’ll see thousands of stars – about 6,000 or so. But that’s only a tiny fraction of all the stars out there. The rest are too far away for us to see them.