Most explanations rely on "dark energy" to explain the Universe's accelerating expansion rate, but a new study takes a ...

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

Astronomers are making significant strides in detecting an ancient signal from one of the universe’s most unexplored periods.

Using the James Webb Space Telescope, scientists have charted billions of years of galactic evolution, finding that galaxies ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...

Scientists figured out that the universe is billions of years old — after years of reading ancient rocks and dying stars, and ...

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

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

A recent detection from JWST is being widely discussed. The discoverers suggest that it might be an incredible record-breaker ...