Did The universe really begin with a bang, a bounce? The theory that the universe is both possibly having endured a sudden ...

The Big Bang model begins with a point of infinite density where the laws of physics break down. This is a deep theoretical problem that suggests the beginning of the Universe is not fully understood, ...

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

The universe seems to be spinning, and that could explain what dark energy is and why it's weakening while revealing our ...

The Big Bang may mark an end—not the start—of a previous universe's aeon. Penrose's theory sees the universe as an eternal ...

The earliest light in the universe has been traveling across space since just after the Big Bang. Known as the cosmic ...

The LSST camera at the Vera C. Rubin Observatory has released its jaw-dropping first images, each capturing 45 times the area ...

Is the Hubble constant—a key part of how we measure the expansion of our universe—in a crisis? Some cosmologists say yes.

The concept of a rotating universe may hold the key to understanding dark energy and our position within the multiverse.

Guided by fast radio bursts, astronomers at the Center for Astrophysics have mapped how ordinary matter is distributed in the ...

A faint radio glow reveals a million-light-year halo enveloping one of the earliest galaxy clusters, hinting that energetic ...

Understanding how the universe transitioned from darkness to light with the formation of the first stars and galaxies is a ...