Author Question: In the cosmological principle, ________ implies that matter and energy are randomly distributed in ... (Read 61 times)

anshika · **on:** Jul 27, 2018

In the cosmological principle, ________ implies that matter and energy are randomly distributed in space.

A) isotropy
B) relativity
C) universality
D) geometry
E) homogeneity

Question 2

Compare and contrast stars on the upper left and lower right of the main sequence.

What will be an ideal response?

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

Answer to Question 1

E

Answer to Question 2

Stars on the upper left are type O and B. They are hotter, more massive and luminous, have larger radii, are blue-white or white, and have relatively short lifetimes. The hottest, type O, have lines of ionized helium. Stars on the lower right are cooler, less massive and luminous, are smaller and redder, and have very long lifetimes. The coolest have molecular spectral lines.