The true masses of a spectroscopic binary cannot be found by ...

[Caiter2013]

The true masses of a spectroscopic binary cannot be found by astronomers.
 
  Indicate whether the statement is true or false

Question 2

When you measure distances to stars via parallax, it is better to use kilometers or Astronomical Units as the unit of distance.
 
  Indicate whether the statement is true or false

[Heffejeff]

Answer to Question 1

True

Answer to Question 2

False

[Caiter2013]

Thanks for the timely response, appreciate it

[softEldritch]

Wow, this really help