Supermassive black holes are believed to be located at the center of many galaxies because
a. the rotation curve of the galaxy indicates that 90 of the galaxy is dark matter.
b. the orbital motion of material near the center is very fast and indicates a very massive core.
c. the shape of the bulge in all spiral galaxies can only be supported by a supermassive black hole.
d. the spiral structure requires a black hole to maintain the spiral arms.
e. the orbital speeds of a globular clusters in the galaxy are greater than the speed of light.
Question 2
YSOs are in hydrostatic equilibrium.
a. True
b. False
Indicate whether the statement is true or false
This jumping spider's main ocelli (center pair) are very acute.
An illustration of the helium atom, depicting the nucleus (pink) and the electron cloud distribution
Barred Spiral Galaxies
Galaxies Forming by Combining Smaller Units
Selection of a nursing center
A closed loop conductor that forms a circle with a radius of is located in a uniform but ...