The first three strong radio sources,discovered by Reber in the 1930s and 1940s,did NOT include a:

Question

Quizplus · Accepted Answer

The first three strong radio sources discovered by Reber were Cygnus A, Cas A, and Tau A. Cygnus A is a distant galaxy with an active galactic nucleus, Cas A is a supernova remnant, but Tau A is neither a galactic nucleus nor a distant galaxy, it is a radio source associated with the Crab Nebula in our own Milky Way galaxy. Therefore, option C, which suggests a globular cluster, is the only option that is not applicable to any of the three sources.

The First Three Strong Radio Sources,discovered by Reber in the 1930s