Which one of the following is not an astronomical object?
A
Pulsar
B
Brittle Star
C
Black Hole
D
Quasar
Correct Answer: Brittle Star
Brittle Star is not an astronomical object. Brittle star, also called serpent star, any of the 2,100 living species of marine invertebrates constituting the subclass Ophiuroidea (phylum Echinodermata).