What was the universe like in the first few hundreds of millions of years after it came into existence? How did the first ...

In 1916, Albert Einstein discovered that his theory of general relativity predicted the existence of gravitational waves — ...

Astronomers have discovered what is claimed to be the oldest confirmed black hole in the universe, providing a glimpse into ...

In space, no one can hear you scream, but they can sure hear you scratching your head as you try to make sense of the ...

To astronomers in the 1990s, these three facts were self-evident: The universe is expanding; all the matter in the universe ...

NASA's James Webb Space Telescope has potentially identified 300 ancient objects, possibly early galaxies formed shortly ...