A star on the upper edge of the main sequence denotes that: A) ...

[torybrooks]

A star on the upper edge of the main sequence denotes that:
 
  A) it has exhausted nearly all hydrogen in its center.
  B) it has reached stability for the first time.
  C) it is in the zero-age main sequence.
  D) it is converted into a brown dwarf.

Question 2

Which of the following statements is true of interstellar dust?
 
  A) It makes up about 10 percent of the mass of the interstellar medium.
  B) The average size of particles of interstellar dust is 1 micrometer.
  C) It is made mostly of carbon and silicates mixed with frozen water.
  D) It is uniformly distributed through space.

[pallen55]

Answer to Question 1

A

Answer to Question 2

C

[torybrooks]

Thanks for the timely response, appreciate it

[meganmoser117]

YES! Correct, THANKS for helping me on my review