Galaxies look the same whether viewed in visible or X-ray wavelengths.

Question

Quizplus · Accepted Answer

Galaxies appear different when viewed in X-ray wavelengths, as X-rays can reveal high-energy processes such as black holes and supernovae that are not visible in visible light. Galaxies can have very different appearances in visible and X-ray wavelengths. In visible light, we primarily see the stars within a galaxy, while in X-ray wavelengths, we see the hot, diffuse gas that fills the spaces between stars. This gas is often only visible in X-rays because it is so hot and tenuous that it doesn't emit detectable amounts of visible light. So, the appearance of a galaxy can be quite different when viewed in X-rays compared to visible light.

Galaxies Look the Same Whether Viewed in Visible or X-Ray