Spiral galaxy NGC 5468

Cosmology

Webb Telescope Measures Universe’s Expansion

Astronomers have used the Webb telescope to observe Cepheid variable stars, ruling out one source of the prevailing "Hubble tension.”

Milky Way

Milky Way: Young Stars in an Old Bulge

The presence of stars just 100 million years old in the Milky Way Galaxy’s central regions confirms our galaxy’s nonviolent past.