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Home Q & A Board Science-Related Homework Help Physics Astronomy
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nmar nmar
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6 years ago
The H-R diagram of a young star cluster shows
 
  a. that high-mass stars have not yet reached the main sequence yet.
  b. that low-mass stars have not yet reached the main sequence yet.
  c. mainly giant stars.
  d. no stars since none have reached the main sequence yet.

Question 2

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound by gravity.
 
  Fill in the blank(s) with correct word

Question 3

A jet has an angular length of 10 seconds of arc and flows from a star at a distance of 2,000 pc. How far does this jet extend away from the star?
 
  a. 20,000 pc
  b. 20,000 AU
  c. 20, 000 ly
  d. 20,000 miles
  e. 20,000 km

Question 4

The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds.
 
  Fill in the blank(s) with correct word

Question 5

If the dust around a protostar radiates most strongly at 30 microns or 30,000 nm, what is the approximate temperature of that dust? Hint: T in K = 3,000,000/wavelength in nm or use Wien's Law.
 
  a. 100,000 K
  b. 10,000 K
  c. 1000 K
  d. 100 K
  e. 10 K
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saysaysaysay
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6 years ago
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nmar Author
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#2
6 years ago
Smiling Face with Glasses Feeling super confident now, TY
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