To search for alien life - even exotic life beyond our imagination - a new study suggests looking for "patterns of energy" instead of just organic molecules.
The Curiosity rover has found deposits of carbonates on Mars. It's evidence for an ancient carbon cycle and could explain what happened to Mars' atmosphere.
The Lucy spacecraft is heading to Jupiter's Trojan asteroids. But now it made its 2nd asteroid encounter with the main-belt asteroid Donaldjohanson on April 20.
Astronomers have discovered the most distant known spiral galaxy. It's thought be similar to what our own Milky Way galaxy looked like, 1 billion years after the Big Bang.
New observations by the Webb Space Telescope have reignited the debate about possible life on K2-18b, a potentially habitable exoplanet 124 light-years away.