This topic contains a solution. Click here to go to the answer

Author Question: Suppose our Sun were suddenly replaced by a supergiant star. Which of the following would be true? ... (Read 86 times)

formula1

  • Hero Member
  • *****
  • Posts: 666
Suppose our Sun were suddenly replaced by a supergiant star. Which of the following would be true?
 
  A) The supergiant would appear as large as the full Moon in our sky.
  B) Earth would fly off into interstellar space.
  C) The supergiant's surface temperature would be much hotter than the surface temperature of our Sun.
  D) Earth would be inside the supergiant.

Question 2

Why can the Tully-Fisher relation be used at greater distances than Cepheids?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kbennett34

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

D

Answer to Question 2

We must image the individual star and follow its light curve for the period-luminosity relation of Cepheids, but the Tully-Fisher relation depends on the light of the galaxy having its spectral lines broadened by the galaxy's spin; this can be detected from far larger distances than single star images can.



formula1

  • Hero Member
  • *****
  • Posts: 666
Both answers were spot on, thank you once again




 

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

For a complete list of videos, visit our video library