What's up in

dark energy

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.

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.

Gif of a spinning sphere that has a dappled blue, green and red pattern.
Abstractions blog

How Ancient Light Reveals the Universe’s Contents

January 28, 2020

A photograph of the infant cosmos reveals the precise amounts of dark matter and dark energy in the universe, leaving precious little room for argument.

Supernova in galaxy NGC 5584.
Abstractions blog

No Dark Energy? No Chance, Cosmologists Contend

December 17, 2019

A study challenged the evidence for the mysterious antigravitational force known as dark energy. Then cosmologists shot back.

Illustration of three flat sheets, connoting a flat universe, and three balls, connoting a closed universe.
Abstractions blog

What Shape Is the Universe? A New Study Suggests We’ve Got It All Wrong

November 4, 2019

Most every cosmologist believes the universe is flat. A new analysis argues that it’s closed.

An illustration of a planet in front of a star.
Abstractions blog

Physics Nobel Honors Early Universe and Exoplanet Discoveries

October 8, 2019

The astronomers Michel Mayor and Didier Queloz won half of the prize for their 1995 discovery of a Jupiter-like planet orbiting a nearby star. The cosmologist James Peebles won the other half for work exploring the structure of the universe.

An illustration of the cosmologists Wendy Freedman and Adam Riess debating the expansion rate of the universe at a recent meeting at the Kavli Institute for Theoretical Physics in Santa Barbara, California.
cosmology

Cosmologists Debate How Fast the Universe Is Expanding

August 8, 2019

New measurements could upend the standard theory of the cosmos that has reigned since the discovery of dark energy 21 years ago.

Valeria Pettorino in the woods near CosmoStat
Q&A

An Italian Cosmologist Who Wanders in Dante’s Dark Wood

November 13, 2018

A scientist and programmer with a literary bent, Valeria Pettorino thinks multiple angles and diverse points of view are needed to unriddle the nature of dark matter and dark energy.

Art for "Dark Energy May Be Incompatible With String Theory"
theoretical physics

Dark Energy May Be Incompatible With String Theory

August 9, 2018

A controversial new paper argues that universes with dark energy profiles like ours do not exist in the “landscape” of universes allowed by string theory.