At 3.3 billion light-years across, the ring may challenge the “cosmological principle” that the universe looks uniform at sufficiently large scales.

Nearly everything in the universe is made of mysterious dark matter and dark energy, yet we can’t see either of them directly. Scientists are developing detectors so sensitive they can spot particle ...

The fate of the cosmos may be a bit different than previously expected. For years, scientists have talked about how the universe is always expanding — constantly moving outward, never stopping.

Scientists, peering 7 billion years back into the past, have discovered something that may help us better understand the ...

HOUSTON—NASA’s SPHEREx observatory completed the first of four planned all-sky surveys in 102 infrared wavelengths as 2025 neared its end to help answer some key astrophysical questions about the ...