We classify galaxies by:
A) their true shapes
B) how they appear on the sky
C) the amount of gas and dust in them
D) whether they are near or far from us
E) the amount of dark matter they contain

Question

Quizplus · Accepted Answer

Galaxies are classified based on their appearance in the sky, which includes their shape and structure as observed from Earth. This classification system is known as the Hubble sequence or Hubble tuning fork.

We Classify Galaxies By