In a spectroscopic binary system, the star showing the larger ...

[go.lag]

In a spectroscopic binary system, the star showing the larger blue shift is
 
  A) cooler and receding the fastest.
  B) less massive of the pair and receding slower.
  C) more massive and approaching us.
  D) less massive and approaching us at this moment.
  E) hotter and receding faster.

Question 2

You are a novice telescope builder. Should you attempt a 6 Newtonian or Cassegrain reflector first? Why?
 
  What will be an ideal response?

[abro1885]

Answer to Question 1

D

Answer to Question 2

The Newtonian uses only a curved main mirror and a small flat secondary. The primary for the Cassegrain also needs a hole to be drilled in its center, and its small secondary is convex in shape, harder to make than the flat for the Newtonian.

[go.lag]

TYSM

[kthug]

Excellent