Animation of the findings by researchers who used time-delay cosmography to independently confirm that the universe’s current ...

Explore the evidence that supports the theory of the expanding universe, including the observations of distant galaxies and ...

WASHINGTON (Reuters) - New data involving millions of galaxies and luminous galactic cores is providing fresh evidence that the enigmatic and invisible cosmic force called dark energy - responsible ...

Astronomers are closing in on a result so statistically secure that, in their language, it borders on certainty: a 99.9999999 ...

How fast is the universe expanding? This is what a recent study published in The Astrophysical Journal hopes to address as a team of scientists investigated to see if what’s known as the Standard ...

Although some compelling evidence exists to support the idea that a repulsive force similar to dark energy exists, it has yet to be directly observed or measured. To circumvent this uncomfortable ...

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This graphic offers a glimpse of the history of the Universe, as we currently understand it. The cosmos began expanding with the Big Bang but then around 10 billion years later it strangely began to ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, Hawaiʻi Island, have made one of the most precise independent measurements ...