"A supercomputer simulation shows many galaxies merging over time. The parts of galaxies we can see are glowing stars forming ...

After more than a decade of charting the stars with extraordinary precision, the Gaia spacecraft has completed its mission.

A new study reports the first direct observation of merging star clusters in the nuclear region of dwarf galaxies. This ...

The final messages sent to Gaia will continue to be carried out into space as the observatory sleeps, and as data from it continues to contribute to astronomy. As Gaia Mission Manager Uwe Lammers put ...

The Big Wheel galaxy formed just 1.7 billion years after the Big Bang, at a time when the universe was only 15% of its current age.

They think that a now rogue supermassive black hole originated from this galaxy, kicked out of its original location after a galactic merger brought two supermassive black holes too close together.

They also detected a radio signal they believe to be the relic of a galactic merger between Abel 1213’s central galaxy and another galaxy. However, this relic does not appear to be the cause of ...