Author Question: The tiny ripples in the background radiation COBE found are due to A) bubble-like nature of ... (Read 97 times)

waynest · **on:** Jul 27, 2018

The tiny ripples in the background radiation COBE found are due to

A) bubble-like nature of space.
B) reddening by interstellar dust clouds in our galaxy.
C) a gravitational redshift caused by growing dark clumps.
D) variations in the speed of different wavelengths of light.
E) different velocities of the edge of the universe.

Question 2

Where do the majority of naked-eye stars fall on the H-R diagram? Is this true of the majority of stars close to our Sun as well?

What will be an ideal response?

princessflame2016 · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

C

Answer to Question 2

Most bright stars are much hotter main sequence stars than our Sun, so lie above it and to the left on the main sequence. Red dwarfs are actually the most common type of stars in the sky and are underrepresented on H-R diagrams of visible stars because they are dim.