The designation active galaxy does NOT include:

Question

Quizplus · Accepted Answer

The designation "active galaxy" specifically refers to galaxies that have an active nucleus, meaning that there is a supermassive black hole at the center of the galaxy that is actively accreting material and emitting radiation. However, not all galaxies that contain a black hole are active galaxies, as some black holes may not actively accrete material or emit radiation. Therefore, choice D is the best answer as it is the only option that is not necessarily included within the designation of "active galaxy."

The Designation Active Galaxy Does NOT Include