Galaxies

Directly mapping the Milky Way is an extremely challenging task, but observations of other galaxies helped us piece together what our home galaxy looked like.

An unexpected and unexplained gamma-ray signal from beyond the Milky Way found among 13 years of NASA Fermi Telescope data could be linked to another cosmic mystery.

Astronomers inadvertently discovered a "dark" galaxy rich in gas but lacking stars when they pointed the Green Bank Telescope in the wrong direction.

Mysterious "odd radio circles" or ORCs that compass entire galaxies may have finally been explained, with astronomers pointing the finger at winds from bursts of supernova star explosions.

New observations of the Small Magellanic Cloud show that it might actually be two galaxies disguised as one.

Observations have revealed the first-ever seismic waves seen in an ancient galaxy, offering new insight on the origins of our very own Milky Way.

The new study of galaxies, centered around a value for cosmic lumpiness known as S8, could join the Hubble tension in dethroning our best picture of how the universe evolved.

For decades, measurements of the universe's expansion have suggested a disparity, which threatens to break cosmology as we know it. The James Webb Space Telescope is looking at it.

"We knew these galaxies were prodigious star factories, perhaps among the biggest the universe has ever seen."

The winds extend tens of thousands of light years above and below galaxies.