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.

Red giant stars in galaxy halos

Cosmology

Tension Over Hubble Constant Continues

A new measurement fuels an ongoing debate about the rate at which today’s universe is expanding.

Cosmology

Dark Energy Survey Releases First Three Years of Data

Results from the first data release of the Dark Energy Survey include eleven new stellar streams in the Milky Way galaxy.

Cosmology

Does Dark Energy Change Over Time?

Scientists are considering whether the mysterious “force” accelerating the universe’s expansion changes with time.

Gravitationally lensed quasar

Cosmology

H0Li COW! Is Our Universe Expanding Faster Than We Thought?

Observations of lensed quasars suggest the universe is expanding more quickly than we thought. But they contradict what we know about the young universe.

Cosmology

Quasars Track Expanding Universe

The most precise measurement yet of the Hubble parameter illuminates dark energy — the elusive entity that’s accelerating the universe’s expansion.

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