A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Where is the center of the universe? Learn why researchers say the rules may not apply to the center of the universe.

"The discovery of this stream highlights how much is still unknown about the life histories of galaxies, how the hidden ...

Evidence suggests the universe’s expansion has started to slow, not accelerate. The results imply dark energy is weakening ...

Using the James Webb Space Telescope (JWST), astronomers have uncovered a voraciously feeding and rapidly growing ...

The universe is expanding. That much is clearer. But it’s less clear whether this expansion is accelerating or slowing down.

That's the case for a galaxy described in a new paper by PhD student Sijia Cai of Tsinghua University's Department of ...

Astronomers have chased the first stars for decades, squinting at the early universe for any hint of their brief, brilliant lives. Now a tiny, lensed speck coined LAP1-B may be the clearest glimpse ...

Physicists have taken the Universe’s temperature, revealing the searing trillion-degree heat of the Big Bang’s first plasma.

“The Universe will just get colder and deader from now on,” added Douglas Scott, study author and a cosmologist at the ...

Molecules containing noble gases shouldn’t exist. By definition, these chemical elements — helium, neon, argon, krypton, xenon and radon — are the party poopers of the periodic table, huddling in the ...