The final milestone in construction was reached on November 25, as technicians carefully joined the giant telescope's inner ...

If not in visible stars and galaxies, the most likely hiding place for the matter is in the dark space between galaxies.

The filament of matter stretches 50 million light-years, and contains a row of galaxies 5.5 million light-years long that are ...

"Precision in these measurements is critical, as even subtle discrepancies could signal deviations from the model — ...

Scientists have many big questions to tackle about the universe, including how big it actually is. But even the proposed answers aren't straightforward.

A radical new theory begins with a central claim: consciousness is the fundamental field of reality; time, space, and matter ...

New results from the NASA/ESA Hubble Space Telescope suggest the formation of the first stars and galaxies in the early universe took place sooner than previously thought. A European team of ...

A colossal structure in the distant Universe is defying our understanding of how the Universe evolved. In light that has traveled for 6.9 billion years to reach us, astronomers have found a giant, ...

The universe — everything in existence — is expanding every second! It's only been about a hundred years that humanity has known this, too — that most galaxies are traveling away from us and the ...

The James Webb Space Telescope has revolutionized astronomy in just two years of operations, but how can it see a galaxy 33.8 billion light-years away in a universe that is only 13.8 billion years old ...

Update: NASA is now targeting a launch for Friday, March 7. Find the latest information on the mission here. How did the universe begin? How do planets form and galaxies develop? Could life exist ...