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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Unique12312 Unique12312
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6 years ago
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.

Question 2

Radar maps of Venus show impact craters.
 
  Indicate whether the statement is true or false

Question 3

How are astronomers able to determine that quasars are so small?
 
  a. They are variable over a short period of time.
  b. They emit mainly X-rays.
  c. They are only found at very large distance.
  d. The structure of a quasar is completely resolved in images.

Question 4

Outgassing produces gas rich in carbon dioxide, nitrogen, and water vapor.
 
  Indicate whether the statement is true or false
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Lauraem32Lauraem32
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6 years ago
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Unique12312 Author
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#2
6 years ago
Thank you for answering correctly!
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