If we can solve the orbital motion of an eclipsing binary, we can ...

[ec501234]

If we can solve the orbital motion of an eclipsing binary, we can find
 
  a. the mass of each star.
  b. the diameter of each star.
  c. the distance to the binary.
  d. all of the other choices.
  e. the mass of each star and the diameter of each star.

Question 2

What is the ratio of the light-gathering power of a 10-m telescope to that of a 1-m telescope?
 
  a. 10 to 1
  b. 1 to 10
  c. 100 to 1
  d. 1 to 100
  e. 3.2 to 1

[tuwy]

Answer to Question 1

e

Answer to Question 2

c

[ec501234]

Gracias!

[xiaomengxian]

Thanks for the timely response, appreciate it