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 have long struggled to determine whether the universe's accelerating expansion is being driven by a simple cosmological constant, or whether dark energy's influence is evolving over time.

On a mountaintop in Arizona, a telescope with five thousand robotic fingers spent three years staring at fourteen million galaxies. Each night the robots reset themselves and pointed (with a precision ...

A bold claim that the universe’s accelerating expansion was an illusion has been put to the test—and failed. Researchers found that the study behind the controversy made key mistakes when analyzing ...

In the Big Bend region, a portal to the early universe is enabled by the largest dark-sky reserve on Earth. The Hobby-Eberly Telescope at the McDonald Observatory in Fort Davis, Texas, was used to ...

A massive cosmic milestone has just been reached: scientists have completed the largest high-resolution 3D map of the universe ever created. Built using data from over 47 million galaxies and quasars, ...

In a significant milestone, the Dark Energy Spectroscopic Instrument (DESI) has completed its 3D map of the Universe—the highest resolution of any such map yet achieved—on schedule and with more data ...

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