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Home Q & A Board Science-Related Homework Help Physics Astronomy
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sila sila
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6 years ago
H II Regions are also called emission nebulae.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

The _______________ of a radioactive substance is the time it takes for half of the parent isotope atoms to decay into daughter isotope atoms.
 
  Fill in the blank(s) with correct word

Question 3

Explain the difference between apparent visual brightness and absolute visual brightness.
 
  What will be an ideal response?

Question 4

A collection of small, icy bodies are found in the _______________ orbiting in the outer fringes of our Solar System
 
  Fill in the blank(s) with correct word

Question 5

Explain why it would be better to obtain stellar parallax for stars if we could observe from the planet Mars instead of the Earth.
 
  What will be an ideal response?
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Jfiscella88Jfiscella88
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6 years ago
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sila Author
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#2
6 years ago
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