Scientists say fragments of energy may be the fundamental building blocks of the universe—not particles and waves.

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

A monster galaxy from the early universe shows that the cosmos was rich with oxygen when it was only less than 3% of its ...

In a groundbreaking mission set to explore the very fabric of our universe, NASA’s Nancy Grace Roman Space Telescope is gearing up for its launch by May 2027. The telescope will offer a bold new ...

The James Webb telescope's 100-hour reexamination of one of Hubble's most iconic extragalactic images reveals extraordinary ...

The upcoming launch of NASA's powerful James Webb Space Telescope should let astronomers see what some of the universe's first stars and galaxies looked like soon after the Big Bang.

The ancient obect Gz9p3, which appeared as a single point of light through the Hubble Space Telescope, is actually one of the most enormous galaxies in the early universe, James Webb Space ...

Deep-field images from NASA's James Webb Space Telescope revealed 300 unusually energetic early galaxy candidates, offering new insights into how the universe formed and evolved over 13 billion years ...

For decades, measurements of the universe's expansion have suggested a disparity known as the Hubble tension, which threatens to break cosmology as we know it. Now, on the eve of its second ...

Another new theory suggests that dark matter may have been created at the edge of the universe right after the Big Bang, then ...

A team of astronomers have put together the largest, most detailed map of the universe ever created – and you can explore it now.

SPHEREx is set to launch at Friday from California. Here are five things to know about NASA's latest advanced space telescope.