See Figure 18-10 in the Text

Multiple Choice

See Figure 18-10 in the text. NGC 1265, an active galaxy in the Perseus cluster, is described as a head-tail source because

A) it resembles a horse's tail and is located near the Horsehead nebula in Orion.
B) the jets are emitted from the radio lobes and stream toward the nucleus, the reverse of what happens in a normal radio galaxy.
C) this galaxy is peculiar and is exploding and sending out many jets that interact with the surrounding intergalactic material.
D) the two jets interact with the rapidly moving intergalactic medium, which sends them streaming out behind the galaxy in a pair of arcs.