The New Horizons spacecraft zooms toward an object 4 billion miles from Earth.
The Subaru Telescope at the peak of Hawai`i’s Mauna Kea is on the hunt for Planet Nine.
Why do some astronomers think there’s a massive planet on the edge of our solar system?
There may be a ninth planet at the edge of our solar system — it’s not Pluto and it’s not “Planet X.”
High-energy emissions between two galaxy clusters could help astronomers unravel the fabric of the universe.
Discover why scientists and entrepreneurs alike have their sights set on the Moon once again.
Gas trapped in a lattice of ice might buffer Pluto’s subsurface sea from the cooling effects of its icy crust above.
New findings from the Chang’e 4 mission could speak volumes about the Moon’s early days.