News Astronomy

Run of the Mill: Finding galactic building blocks in early universe

By Ron Cowen

- More than 2 years ago

Hunters of distant galaxies, meet Joe Average.

LITTLE GUYS. A glow of hydrogen gas emanates from a population of low-mass, weakly star-forming galaxies believed to be the building blocks of bright, present-day galaxies. Rauch, et al.

For more than 3 decades, astronomers have scoured the skies for tiny, ultrafaint galaxies that could be the early building blocks of the massive galaxies common in the universe today.