The Universe might not exist forever. New observations by physicists indicate that it will one day reach its maximum size ...

When discussing the scale of the universe, we’re immediately faced with an intriguing question: are we tiny beings, or is the ...

On human timescales, the universe may as well be eternal. It’ll be here long after our species and our planet are gone, but ...

A faint radio "whisper" from ancient hydrogen reveals the universe was heating up long before it filled with starlight.

After a century of observations spanning the breadth of the cosmos and theoretical insights that push humanity's vision of ...

Learn how many stars there are in the Milky Way, and how astronomers count them.

Modern cosmology reveals a universe expanding uniformly without a spatial center or edge. The Big Bang wasn't a localized explosion but a simultaneous ...

Pulsars could be helping scientists distinguish between gravitational waves caused by supermassive black hole collisions and ...

Japanese scientists simulated faint 21-centimeter radio waves from the Universe’s “Dark Ages,” offering a potential way to ...

Researchers have unveiled a new model for the universe’s birth that replaces cosmic inflation with gravitational waves as the ...

Not all stars are created equally. Astronomers believe that the first stars to form after the Big Bang were mostly made of ...