Briefly discuss the Hubble constant.
What will be an ideal response?
Question 2Briefly discuss the effect of active galaxies on the clusters of galaxies.
What will be an ideal response?
Question 3A starburst galaxy is a galaxy that:
A) is undergoing a rapid surge of white dwarf explosions.
B) is undergoing a rapid surge of star formation.
C) has never interacted with another galaxy.
D) is undergoing a rapid burst of supernovae explosions.
Question 4A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral emission lines.
A) blazar
B) pulsar
C) quasar
D) quark
Question 5In the context of measuring the properties of galaxies, a__________is an object of known brightness that astronomers use to find distance.
A) black hole
B) white dwarf
C) standard candle
D) red giant
Question 6Which of the following is true of quasars?
A) Quasar eruptions became less common as galaxies became more stable.
B) Quasars did not exist until about five billion years ago.
C) Quasars have comparatively smaller look-back time than most galaxies.
D) Quasars eruptions were not common when galaxies were actively forming and colliding.
Question 7Which of the following is true of active galaxies?
A) They are often distorted.
B) They do not have a black hole.
C) They do not have an accretion disk.
D) They are much larger than many galaxies.
Quick Reply
