#41: sidereal

I shoot for the stars
is it possible that means
I'm sidereal?

How many stars in the "observable" universe? 
100,000,000,000,000,000,000,000,000,000... or so. 
Minimum. 
Estimated. 
(A lot.) 
It's one of the audacities of Humans to even venture a guess. 

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DEFINITION of this 4-syllable adjective:

1. Astronomy. determined by or from the stars: sidereal time.
2. Astronomy. of or pertaining to the stars.