Generally, the densest parts of the interstellar medium are the ...

[charchew]

Generally, the densest parts of the interstellar medium are the ________.
 
  Fill in the blank(s) with correct word

Question 2

Compared to Jupiter, the element ________ is notably less common in Saturn's atmosphere, perhaps condensing to fall toward the core as rain.
 
  Fill in the blank(s) with correct word

[zacnyjessica]

Answer to Question 1

dark dust clouds.

Answer to Question 2

helium

[charchew]

Thanks for the timely response, appreciate it

[patma1981]

YES! Correct, THANKS for helping me on my review