What are the very cold (about 20 K), dense clouds of gas thought ...

[james9437]

What are the very cold (about 20 K), dense clouds of gas thought to be the most massive objects in the Galaxy called?
 
  A) emission nebulae
  B) absorption clouds
  C) dust clouds
  D) molecular clouds
  E) reflection nebulae

Question 2

When an electron is formed from a gamma ray collision, a positron is also made.
 
  Indicate whether the statement is true or false

[SeanoH09]

Answer to Question 1

D

Answer to Question 2

TRUE

[james9437]

Thanks for the timely response, appreciate it

[ecabral0]

Gracias!