Contrast open clusters and associations. What will be an ideal ...

[MGLQZ]

Contrast open clusters and associations.
 
  What will be an ideal response?

Question 2

According to our definition, we have been a technological civilization for about
 
  A) 500 years. B) 100 years. C) 10 years. D) 1000 years. E) 10,000 years.

[rnehls]

Answer to Question 1

Open clusters contain more stars, are better bound gravitationally, and will last much longer-hundreds of millions or billions of years. Associations are less massive clusters spanning a larger region of space, they are less bound, and will break up in tens of millions of years as the Galaxy spins.

Answer to Question 2

B

[MGLQZ]

Thanks for the timely response, appreciate it

[isabelt_18]

Gracias!