Multiple Choice
What percentage of the mass required by the cluster's observed gravity,as shown by the speeds of galaxies in the cluster,is represented by the mass of the presently observable matter in a typical rich cluster of galaxies?
A) 10%
B) 100%,or all of the galaxy
C) About 1%
D) 90%
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The observational fact about a Cepheid variable
Q2: What is the Tully-Fisher relation?<br>A) The more
Q4: Which of the following fundamental astronomical questions
Q5: The Tully-Fisher relation is mainly used for
Q6: In order for gravitational lensing of a
Q7: The rotation curve of a galaxy is
Q8: A preponderance of evidence suggests that an
Q9: What are the characteristics of quasars?
Q10: No known galaxy has its spectra lines
Q11: Lenticular galaxies are intermediate between spiral and