Valles Marineris is a long valley on Mars believed to resemble the rift valleys of eastern Africa.
Indicate whether the statement is true or false
Question 2
What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy?
a. Normal spiral galaxies usually have shorter spiral arms.
b. Normal spiral galaxies never contain a supermassive black hole at their center.
c. The central region of a Seyfert galaxy is much brighter.
d. Seyfert galaxies don't contain any star formation.