First observed interstellar object is a speedy, cigar-shaped asteroid
It has been traveling for hundreds of millions of years.
The TRAPPIST-1 star system may be too old for life
It's up to twice as old as the Solar System.
A nearby Sun-like star hosts four Earth-sized planets
Any life there would get pelted by asteroids and comets, though.
Edible robot surgeons will cure you from the inside out
They're tackling gastrointestinal disease from both ends of the issue.
Early universe 'fireworks' challenge notions of how stars form
The ancient cosmos may have been packed with tiny star incubators.
Astronomers capture best picture yet of the star in Orion’s armpit
It reveals that Betelgeuse’s inner temperature isn’t uniform, which has implications for the giant sun’s future.
Our sun used to have a twin star named Nemesis
A new study suggests that all sunlike stars form in pairs.
Stars can turn into black holes without a supernova
Our assumptions about star death might be misguided.
NASA offers first look at planet-rich Trappist-1 star system
The crude images help to characterize our cosmic neighbor.