Multiple Choice
What is a galactic halo?
A) system of arcs and other gas clouds surrounding a galactic nucleus
B) system of satellite galaxies surrounding the Milky Way Galaxy
C) spherical distribution of stars and globular clusters centered on a nuclear bulge
D) large disk of stars and molecular clouds extending outward from a nuclear bulge
Correct Answer:

Verified
Correct Answer:
Verified
Q3: The positrons near the galactic center can
Q4: Suppose one could examine a star and
Q5: An astronomer finds a very old astronomy
Q6: What is the motion of stars in
Q7: The twentieth century opened with a major
Q9: What happens when the electron in
Q10: Where is the solar system located in
Q11: Which of these accurately describes the characteristics
Q12: The observational fact about a Cepheid variable
Q13: If the black hole in the