Patterns of stars in constellations hardly change in appearance ...

[PhilipSeeMore]

Patterns of stars in constellations hardly change in appearance over times of even a few thousand years. Why?
 
  A) Stars are fixed and never move.
  B) Stars move, but they move very slowlyonly a few kilometers in a thousand years.
  C) Although most stars move through the sky, the brightest stars do not, and these are the ones that trace the patterns we see in the constellations.
  D) The stars in our sky actually move rapidly relative to usthousands of kilometers per hourbut are so far away that it takes a long time for this motion to make a noticeable change in the patterns in the sky.
  E) Stars within a constellation move together as a group, which tends to hide their actual motion and prevent the pattern from changing.

Question 2

Name the four principal types of solar system debris; pair them up in terms of composition.
 
  What will be an ideal response?

[fraziera112]

Answer to Question 1

D

Answer to Question 2

Comets, asteroids, meteoroids, and Kuiper Belt objects. Comets and Kuiper Belt objects are icy, while meteoroids and asteroids are more rocky.

[PhilipSeeMore]

TYSM

[raenoj]

Gracias!