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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.

Art for "A Short History of the Missing Universe"
Abstractions blog

A Short History of the Missing Universe

September 19, 2018

Astronomers have known where the universe’s missing matter has been hiding for the past 20 years. So why did it take so long to find it?

astrophysics

The Last of the Universe’s Ordinary Matter Has Been Found

September 10, 2018

For decades, astronomers weren’t able to find all of the atomic matter in the universe. A series of recent papers has revealed where it’s been hiding.