Primordial magnetic fields may help explain why measurements of the universe’s expansion do not agree. Scientists have long known that the universe is expanding, yet there is still no agreement on how ...

Cousins says he is “hopeful” that the findings of gravitational-wave cosmology will be able shed more light on the Hubble ...

Since its launch in April 1990, the Hubble Space Telescope has been an invaluable tool for astronomers in unraveling the ...

A black patch of sky looks empty until you stop taking it for granted. That is the starting point of a theory from Professor ...

What Came Before The Big Bang?

Discover 15 theories that were once doubted but eventually proven true, showing how ideas ahead of their time can change the ...

A black patch of sky looks empty until you stop taking it for granted. That is the starting point of a theory from Professor Richard Feynman, built around what sounds like a child’s question, why the ...

Artemis II isn’t the only revolutionary space mission in America’s history. Here are a few rocket launches that stand out as ...

A major international effort has produced an ultra-precise measurement of the Universe’s expansion rate, confirming it’s ...

A difference of a few kilometers per second might not sound like much. In cosmology, it has become one of the field’s most ...

Nearly a millennium ago, astronomers witnessed a brilliant new star blazing in the sky—a supernova so bright it was visible in daylight for weeks. Today, its expanding remnant, the Crab Nebula, ...

Douglas Adams told us the answer to life, the universe and everything is 42. If only cosmology were so straightforward. Astronomers have been arguing for years about a number every bit as fundamental, ...