National Aeronautics and Space Administration
Goddard Space Flight Center
Imagine the Universe!
Home
Science
Astronomer's Toolbox
Cosmic Objects
Big Questions
Featured Science
Observatories
Special Exhibits
Scientist Profiles
You Be the Astrophysicist
The Cosmic Distance Scale
Educators' Corner
Lesson Plans
Materials
Programs
Ask an Astrophysicist
Resources
Other Resources
Dictionary
Search
Astronomer's Toolbox
Active Galaxies: Quiz
Active Galaxies Quiz
What kind of object is believed to be in the center of an active galaxy?
[A] A radio telescope
[B] A massive black hole
[C] The Loch Ness monster
Seyfert galaxies emit gamma-rays up to energies of about:
[A] 1 keV
[B] 10 keV
[C] 100 kev
[D] 1000 keV
Gamma-ray quasars are the most powerful particle accelerators in the universe.
[A] True
[B] False
[C] We don't know
Which two types of active galaxies emit gamma-rays?
[A] Seyferts and Blazars
[B] Quasars and Blazars
[C] Seyferts and Quasars
In "active" galaxies, the total energy emitted is the sum of the emission from each of the stars found in the galaxy.
[A] True
[B] False
[C] We don't know
