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If you observe a galaxy that is 4 million ly away, you are observing light that left that galaxy how long ago?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
Describe the structures of a quasar.
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
How many more years does our sun have to live?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
What is an irregular galaxy?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
What stage is our sun in now?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
What are two ways that galaxies change over time?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
What do many astronomers think is at the center of our galaxy?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
What are quasars?
Midlife
Huge central black hole, large disk of gas and dust around it
No shape, little interstellar matter
5 billion
Use up their matter (no new stars) and collisions with other galaxies
Quasi-stellar objects
4 million years
Black hole
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