A star's luminosity is the A) total amount of energy that the ...

[NguyenJ]

A star's luminosity is the
 
  A) total amount of energy that the star radiates each second.
  B) total amount of energy that the star will radiate over its entire lifetime.
  C) surface temperature of the star.
  D) lifetime of the star.
  E) apparent brightness of the star in our sky.

Question 2

The stars in our sky twinkle in brightness and color because of ________.
 
  A) rapid changes in the brightnesses and colors of stars caused by changes in their spectra
  B) turbulence in the Earth's atmosphere
  C) the bubbling and boiling of gases on the surfaces of stars
  D) light pollution

[GCabra]

Answer to Question 1

A

Answer to Question 2

B

[NguyenJ]

Excellent

[xoxo123]

Thanks for the timely response, appreciate it