First Stars (art)

Cosmology

No Signal from Cosmic Dawn

Four years after one experiment found tentative signs of the "cosmic dawn," the era of the first stars, another experiment finds nothing.

Earliest star formation in a far-away galaxy

Cosmology

Early Star Formation Presents New Cosmic Mystery

New observations suggest that stars were forming just 250 million years after the Big Bang — a record-breaker that will likely open a new line of cosmological inquiry.

Abell 2744 galaxy cluster

Cosmology

Hubble Spies Faint Galaxies, Bountiful in Early Universe

Hubble has spotted more than 100 small, faint galaxies in the young universe, common as dust bunnies but previously out of reach of even the best telescopes.

Galaxies

Dwarf Galaxies Packed a Mighty Punch

Light from the puniest galaxies played a bigger role in shaping the early universe than previously thought.

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