Why can't we be certain that the Andromeda Galaxy exists today? ...

[cherise1989]

Why can't we be certain that the Andromeda Galaxy exists today?
 
  What will be an ideal response?

Question 2

What do we mean by a primitive meteorite?
 
  A) a piece of rock that is essentially unchanged since it first condensed and accreted in the solar nebula some 4.6 billion years ago
  B) a meteorite that was discovered by primitive people
  C) a meteorite that fell to Earth at least 4 billion years ago
  D) a type of meteorite that is usually made mostly of high-density metals

[bd5255]

Answer to Question 1

Since it lies 2.5 million light-years distant, the most recent image we have is still 2.5 million years out of date, so we cannot prove it is still there. It probably is, though.

Answer to Question 2

A

[cherise1989]

Gracias!

[jordangronback]

Excellent