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Home Q & A Board Science-Related Homework Help Physics Astronomy
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LM12345 LM12345
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6 years ago
What distance method did Edwin Hubble use to determine the distance to local galaxies?
 
  a. Hubble Law
  b. Supernova observations
  c. Period-luminosity relationship of variable stars
  d. Parallax

Question 2

____________________ is responsible for absorbing ultraviolet radiation in Earth's upper atmosphere.
 
  Fill in the blank(s) with correct word

Question 3

What is the primary factor in determining the classification for an elliptical galaxy?
 
  a. Size
  b. Shape
  c. Mass
  d. Color

Question 4

What do astronomers generally believe about the origin of Mars' moons?
 
  a. They formed with the planet out of the protoplanetary material.
  b. They formed elsewhere and were captured at a later time.
  c. They were ejected from Mars during its formation.
  d. They were once a single moon and a later catastrophic event broke them in two.
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kaefolkaefol
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6 years ago
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LM12345 Author
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6 years ago
This helped my grade so much Perfect
Ifekwunigwe
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Yesterday
Helped a lot
rileyjones420
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2 hours ago
Thank you, thank you, thank you!
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