What three properties of stars can astronomers determine by analyzing the spectrum of the stars light?

1 Answer
Write your answer here...
Start with a one sentence answer
Then teach the underlying concepts
Don't copy without citing sources
preview
?

Answer

Write a one sentence answer...

Answer:

Explanation

Explain in detail...

Explanation:

I want someone to double check my answer

Describe your changes (optional) 200

4
Jun 7, 2016

Answer:

See explanation...

Explanation:

My list of three was:

  • Chemical composition
  • Temperature
  • Relative motion

Chemical composition can be determined from emission or absorption lines in the spectrum.

Temperature can be measured based on the peak of the black body radiation, which ranges across a wide range of frequencies.

Relative velocity can be measured by the red or blue shift of the emission or absorption lines.

Apart from these three, the spectrum can be used to help determine:

  • Density
  • Mass
  • Distance
  • Luminosity

One interesting factor is how much the emission lines or absorption lines are spread. This might indicate a surrounding protoplanetary disc or suchlike.

Was this helpful? Let the contributor know!
1500