The unified model describes active galactic nuclei using a. a ...

[jeatrice]

The unified model describes active galactic nuclei using
 
  a. a supermassive black hole at the center of a normal spiral galaxy.
  b. a supermassive black hole surrounded by an accretion disk and dense disk of gas.
  c. an accretion disk around a neutron star.
  d. gravitational lenses to intensify the radiation coming from them.
  e. different lines of sight toward and dwarf irregular galaxy.

Question 2

A Type Ia supernova is believed to occur when
 
  a. the core of a massive star collapses.
  b. hydrogen detonation occurs.
  c. a white dwarf exceeds the Chandrasekhar limit.
  d. the cores of massive stars collapse.
  e. neutrinos in a massive star become degenerate and form a shock wave that explodes the star.

[shayla]

Answer to Question 1

b

Answer to Question 2

c

[jeatrice]

Gracias!

[sailorcrescent]

Excellent