For nearly a century, astronomers have known that the universe is expanding. In the late 1990s, two independent teams, the ...

The expansion of the universe is still accelerating under the influence of dark energy, despite recent claims to the contrary.

Cosmologists are finally beginning to sketch a coherent picture of the universe we cannot see, using exquisitely detailed maps of galaxies, ghostly light and the large scale structure of space itself.

A new machine-learning analysis has reopened the debate over a mysterious gamma-ray glow at the center of the Milky Way. By ...

An observatory in Chile is taking a timelapse of the sky over the Southern Hemisphere to help scientists measure the ...

The Bullet Cluster of galaxies might only have half as much dark matter than scientists thought, or perhaps even none at all, ...

Science is a story of coming up with theories then doing our best to disprove them. That is especially true for theories on a grand, cosmological scale, though disproving them can be particularly hard ...

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Almost 30 years ago, dark energy was proposed as the force responsible for the accelerating expansion of the universe. But for UC Davis mathematicians, the math didn't add up. Their new study ...

A puzzling ultraviolet light seen across the Milky Way could come from the destruction of nuggets of dark matter, the mysterious stuff that makes up around a quarter of the matter and energy in the ...

This is read by an automated voice. Please report any issues or inconsistencies here. Physicists studying dark matter — an invisible substance comprising 85% of the universe — turn to religious and ...