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100-year-old assumption about the universe may soon be overturned

Physicists have long assumed that the universe is uniform at very large scales, but evidence is emerging this is wrong and suggests a way to resolve some of the biggest cosmological mysteries

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The bombshell results that demand a new theory of the universe

Space

The bombshell results that demand a new theory of the universe

Features

Crisis in cosmology: If we’ve got dark energy wrong, what could it be?

Space

Crisis in cosmology: If we’ve got dark energy wrong, what could it be?

Features

We’ve glimpsed before the big bang and it’s not what we expected

Space

We’ve glimpsed before the big bang and it’s not what we expected

Features

Space

Weird clump in the early universe is piping hot and we don’t know why

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Space

Is the expansion of the universe slowing down?

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Space

There is an odd streak in the universe – and we still don’t know why

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Why mathematicians want to destroy infinity – and may succeed

Mathematics

Why mathematicians want to destroy infinity – and may succeed

Features

The NIRCam (Near-Infrared Camera) instrument on NASA?s James Webb Space Telescope?s reveals a portion of the Milky Way?s dense core in a new light. An estimated 500,000 stars shine in this image of the Sagittarius C (Sgr C) region, along with some as-yet unidentified features. A large region of ionized hydrogen, shown in cyan, contains intriguing needle-like structures that lack any uniform orientation. NASA, ESA, CSA, STScI, and S. Crowe (University of Virginia).

Space

The cosmos is vast, so how do we measure it?

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Vera C. Rubin Observatory

Video

Look inside the revolutionary Vera C. Rubin Observatory

91av's behind the scenes look at the telescope about to open a new eye on the universe

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Space

Best ever map of early universe is double-edged sword for cosmologists

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Space

Astronomers have spotted the largest known object in the universe

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Space

Why does our universe have something instead of nothing?

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Physics

There may be a cosmic speed limit on how fast anything can grow

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