EBOSS map of the universe

Cosmology

New 3D Map of the Universe — and a Growing Cosmological Debate

The Sloan Digital Sky Survey has released a new map of the universe — and the results confirm ongoing tension over the expansion rate of the universe.

artist's conception of BAO

Cosmology

BOSS: A Ruler to Measure Them All

Amidst the release of a treasure trove of astronomical data, scientists announce the most precise “standard ruler” yet for cosmological distances.

Illustration of baryon acoustic oscillations

accurate for distances

Dark Energy BOSSes Around the Universe

Astronomers are honing in on the nature of dark energy, a mysterious, repulsive energy that pervades all of space. Among the questions they're trying to answer: does dark energy exist?

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