Scientists have observed the largest-known rotating structure in the cosmos – a gargantuan thread-like assemblage of hundreds of galaxies, gas and dark matter that makes up a filament in the ...

The U.S. Space Force (USSF) turns six years old today. The youngest branch of the U.S. military was established on December 20, 2019, with the passage of the John S. McCain National Defense ...

Scientists watching the nearby Fomalhaut star system have directly seen two protoplanets smash together for the first time. Then, they saw it happen again.