Author Question: Most of the galaxies in the Local Group are: A) big spirals like our Galaxy and M31. B) small ... (Read 82 times)

lbcchick · **on:** Jul 27, 2018

Most of the galaxies in the Local Group are:

A) big spirals like our Galaxy and M31.
B) small spirals like M33 and the LMC.
C) small irregulars like the Magellanic Clouds.
D) active galaxies like Centaurus A.
E) small ellipticals like the companions to M31 in Andromeda.

Question 2

This design involves only one optical surface, a concave mirror.

A) prime focus reflector
B) Newtonian reflector
C) Cassegrain reflector
D) Gregorian reflector
E) refractor