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cosmology

Distorted galaxies
Abstractions blog

A New Cosmic Tension: The Universe Might Be Too Thin

September 8, 2020

Cosmologists have concluded that the universe doesn’t appear to clump as much as it should. Could both of cosmology’s big puzzles share a single fix?

The cyclic universe.
Abstractions blog

Big Bounce Simulations Challenge the Big Bang

August 4, 2020

Detailed computer simulations have found that a cosmic contraction can generate features of the universe that we observe today.

Center of the Milky Way
Abstractions blog

An Alternative to Dark Matter Passes Critical Test

July 28, 2020

Modified gravity theories have never been able to describe the universe’s first light. A new formulation does.

Magnetic fields in the universe.
cosmology

The Hidden Magnetic Universe Begins to Come Into View

July 2, 2020

Astronomers are discovering that magnetic fields permeate much of the cosmos. If these fields date back to the Big Bang, they could solve a major cosmological mystery.

Katie Mack portrait.
Q&A

This Cosmologist Knows How It’s All Going to End

June 22, 2020

The astrophysicist and social media phenom Katie Mack is ready to tell you about the fate of the universe.

Animation of black hole formation.
mathematical physics

New Math Proves That a Special Kind of Space-Time Is Unstable

May 11, 2020

Einstein’s equations describe three canonical configurations of space-time. Now one of these three — important in the study of quantum gravity — has been shown to be inherently unstable.

An image of space with lines emanating from a central point, as if the viewer is traveling at warp speed.
Abstractions blog

What Might Be Speeding Up the Universe’s Expansion?

April 27, 2020

Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space.

Multimedia

What Is the Geometry of the Universe?

March 16, 2020

In our mind’s eye, the universe seems to go on forever. But using geometry we can explore a variety of three-dimensional shapes that offer alternatives to “ordinary” infinite space.

Cosmic reionization video.
Abstractions blog

How the Cosmic Dark Ages Snuffed Out All Light

March 2, 2020

The recent discovery of some of the first galaxies in the universe illuminates the darkest era in cosmic history.