What kind of weather does Saturn have?

Empty quarter and sandy desert

Some of the great contributes to advancement in the us were immigrants

1. why do astronomers think that there may be other advanced civilizations?
because  it was discovered that there are other planets like earth out there, able to  accommodate life forms.
2. what technologies are astronomers using to look for life on other planets? why?  
they  have used radio telescopes, but now they use laser telescopes   to track laser communications.

The answer is 148, i can't really explain it, i got frustrated and guessed because all of my math was not giving me any of the answer choices