Describe the observations that convinced astronomers that M87 is an active galaxy.

Instructions
Research each of the following four topics and submit your answers in a document in .docx (Word) or PDF format:

Describe some differences between quasars and normal galaxies.
Describe the observations that convinced astronomers that M87 is an active galaxy.
Describe the evolution of an elliptical galaxy. How does the evolution of a spiral galaxy differ from that of an elliptical?
What is the evidence that a large fraction of the matter in the universe is invisible?
Rubric – each question is 25 pts.

Additional Instructions-

Your submission should use 12-point font and be double spaced.
Outside research and use of academic sources are expected to fully address each topic/question.
The intended audience for your responses are people familiar with the subject matter, but not experts.
A reasonable amount of jargon can be used and detailed explanations on the topics are expected.
Answers should be in complete sentences and fully explain your thought-process and/or step through your conclusions.
The full length of the submission should be around two pages, however each question should be fully addressed so additional pages may be needed.
Figures, graphics, or other additions that add to your responses are strongly encouraged.
These figures, etc. need to be incorporated into your answer (i.e. called out) and have a proper APA citation and reference.
Include a list of all sources you used for your answers in a reference list included with the assignment. The citations and reference list need to be in APA format.

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