In the solar neighborhood we can map the position of spiral arms ...

[B]

In the solar neighborhood we can map the position of spiral arms by observation of objects that are determined to be relatively ________ in age.
 
  Fill in the blank(s) with correct word

Question 2

Occam's Razor
 
  A) divides the inner planets from the outer planets.
  B) tells scientists to use the simplest model, all other things being equal.
  C) is the term that describes how thin the rings of the Jovian planets are.
  D) describes how a planet's orbital period and distance from the Sun are related.
  E) is the tool that Copernicus used to shave.

[kbennett34]

Answer to Question 1

young

Answer to Question 2

B

[B]

TYSM

[JaynaD87]

Excellent