The collision took place 10 billion years ago, when the universe was just three or four billion years old.
Researchers used the European Space Agency's star-mapping satellite to make a stunning discovery about the Milky Way.
Peter Dinklage (Tyrion) will star in the post-apocalyptic film "I Think We're Alone Now."
The latest findings shed new light on supernova explosions and the late stages of stellar evolution.
Scientists think that at the heart of nearly every galaxy lies a supermassive black hole (SMBH) with immense gravity.
The findings could have implications for how planets form and the search for Earth-like worlds.
KELT-9b is the hottest planet ever discovered.
You just need four ingredients.
Around dusk tonight, Castor and Pollux will form a nearly straight line with Venus.
The test photo includes more than 200,000 stars.
The "unprecedented map" captures the position and brightness of nearly 1.7 billion stars.
Widening waistbands are truly universal.
The Galactic Archaeology survey was launched in a bid to provide new insights into the formation and evolution of the Milky Way.
Scientists think the galaxy is expanding at about 550 yards per second.
"These lenses are amazing cosmic telescopes."