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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?
Modified gravity theories have never been able to describe the universe’s first light. A new formulation does.
Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space.
In a new paper, physicists argue that hypothetical particles called axions could explain why the universe isn’t empty.
Physicists have long searched for hypothesized dark matter particles called WIMPs. Now, focus may be shifting to the axion — an ultra-lightweight particle whose existence would solve two mysteries at once.
Most every cosmologist believes the universe is flat. A new analysis argues that it’s closed.
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.