This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Suppose our Sun were suddenly replaced by a supergiant star. Which of the following would be true? ... (Read 83 times)

formula1

  • Hero Member
  • *****
  • Posts: 666
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
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
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


kbennett34

  • Sr. Member
  • ****
  • Posts: 333
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

By definition, when a medication is administered intravenously, its bioavailability is 100%.

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 U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Apparent and True Orbits of Alpha Centauri. Apparent and True Orbits of Alpha Centauri.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Balmer Lines in the Spectrum of a Star Balmer Lines in the Spectrum of a Star
Center of Mass of a Binary Star System Center of Mass of a Binary Star System
The Structure of an Old Low-Mass Star The Structure of an Old Low-Mass Star
Sea Star Body Plan Sea Star Body Plan
Video: Functional zones in a mitochondrion

For a complete list of videos, visit our video library