Active Galactic Nuclei

Introduction Galaxy Spectra Spiral Galaxies Elliptical Galaxies Introduction Galaxies are huge collections of stars which are held together by gravity. Often, large galaxies have centers (also called nuclei) which contain supermassive black holes. Some galaxies appear “active” when large amounts of stars, gas and other material get fed into the black hole and this process … Continue reading Active Galactic Nuclei