For a quarter century, cosmology has rested on a simple but audacious idea: that a fixed “cosmological constant” drives the ...

To astronomers in the 1990s, these three facts were self-evident: The universe is expanding; all the matter in the universe is gravitationally attracting all the other matter in the universe; ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

UC Santa Cruz astronomer Alexie Leauthaud is bringing her cosmology expertise to climate action through Seed Spoon Science, a ...

This video explains how scientists estimate the size of the observable universe, what “radius” means in cosmology, and why ...

The past, present and future of the universe is about to be revealed in unprecedented detail by Britain’s biggest academic supercomputer called the Cosmology Machine, based at the University of Durham ...

By combining different kinds of observations, cosmologists have shown that what we see is more easily explained if neutrinos, ...

Early 20th-century cosmology transitioned from galactic astronomy with Edwin Hubble's discovery of external galaxies and the universe's expansion, which Albert Einstein's general relativity later ...

The findings from the University of Sheffield relate to the possible relationship between dark matter, the mysterious, ...

An inexplicably hot, fast-growing cluster of galaxies in the early universe has scientists questioning theories of galactic ...

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of "Ask a Spaceman" and "Space Radio," and author of "How to Die in Space." Sutter contributed this article to ...