Astronomers Detect the Faint Glow of Stars in Between Galaxies

Not all stars are members of galaxies. Some stars exist in the space between galaxies, though they didn’t form there. They’re called intra-group stars, and astronomers study them by observing their light, called intra-group light (IGL.) They’re challenging to observe because their light is extremely faint and overpowered by the light of nearby galaxies. Astronomers …