In July 2016, New Horizons spotted Quaoar, a distant Kuiper Belt object measuring 690 miles (1,110 km) across.
The collision likely resembles the one that formed the Moon around 4.5 billion years ago.
Astronomers had decent guesses about how these peanut-shaped asteroids formed but couldn’t get the physics to work—until now.
Venus may be hiding a vast network of underground caves carved by ancient lava.
A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.
The volcanic hot spot is larger than Lake Superior, spewing eruptions six times the total energy of all of the world's power plants.
The encounter left behind a trace in the clouds of gas and dust surrounding our solar system.