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 80 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?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

star cluster NGC 6604 star cluster NGC 6604
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
Star Map Star Map
Star-Nosed Mole Star-Nosed Mole
Smooth Brittle Star. Smooth Brittle Star.
Video: ATPase function - membrane transport, contractile proteins and synthesis

For a complete list of videos, visit our video library