Persistent tremors on Mars suggest the planet’s interior is cooling and hint that there might be a pocket of magma beneath the surface.
Astronomers have discovered a galaxy that formed five times as many stars as the Milky Way within 2 billion years after the Big Bang — but then quickly quelled any further starbirth.
New Horizon’s flyby of Arrokoth, a planetesimal in the Kuiper Belt, reveals a pristine object untouched since the solar system’s origin. Its shape and geology show that planetesimals form more gently than previously thought.
Whether you're celebrating Valentine's Day or boycotting it, anyone visiting this site loves the stars. Here's a chance to participate in an effort to make sure future generations love them too.