New studies find the interstellar comet 2I/Borisov is the most "pristine" ever discovered.
Scientists find routes using arches of chaos that can lead to much faster space travel.
This meteorite is the oldest known volcanic rock in the solar system, dated at 4,565,000,000 years old.
A machine learning algorithm has shown it can discover planets from weak signals overlooked in the Kepler spacecraft’s database.
TRAPPIST-1 is 40 light years from Earth. It would take us millions of years to get there.