Which of the following statements about rich clusters of galaxies (those with thousands of galaxies) is not true?
A) They are sources of X-ray emission due to the presence of hot, intergalactic gas.
B) There likely have been numerous collisions among the member galaxies at some time in the past.
C) Galaxies in the central regions are predominantly spirals, while elliptical galaxies roam the outskirts.
D) They often have a very large, central dominant galaxy near their center, perhaps formed by the merger of several individual galaxies.
E) The speeds of the galaxies in the cluster indicate that most of the cluster mass is dark matter.
Question 2
Black holes with masses greater than a million solar masses explain the extremely rapidly moving stars and gas in the cores of galaxies.
Indicate whether the statement is true or false
A rich diversity of life lives in and among coral reefs.
Spiral Galaxies Seen Nearly Edge On from the Milky Way
An injector imbalance can cause a lean or a rich misfire.
Examples of Mission Statements
How to convert verbal statements into algebraic equations (Part 1)
Eating calcium-rich foods daily assists with bone health, muscle contraction, and blood clotting