A spaceship is headed toward Alpha Centauri at 0.999c. According ...

[nmorano1]

A spaceship is headed toward Alpha Centauri at 0.999c. According to us, the distance to Alpha Centauri is about 4 light-years. How far away is Alpha Centauri according to the travelers in the ship?
 
  A) also about 4 light-years
  B) very slightly more than 4 light-years
  C) very slightly less than 4 light-years
  D) quite a bit less than 4 light-years
  E) quite a bit more than 4 light-years

Question 2

What is a galactic wind?
 
  A) a jet of ionized particles shot out of a starburst galaxy
  B) hot gas erupting into intergalactic space from a large superbubble
  C) the heat (infrared radiation) emitted by dust grains in the large molecular clouds of starburst galaxies
  D) the cooler gas pushed out of a starburst galaxy by the intense radiation pressure
  E) a wind created by the expansion of the universe that can move galaxies around

[aloop]

Answer to Question 1

D

A spaceship is moving past us at a speed close to the speed of light.

Answer to Question 2

B

[nmorano1]

Both answers were spot on, thank you once again

[aloop]

Great! Please up vote