Q is for Quasar

Quasars are a "very energetic and distant active galactic nucleus."  Interpret that as you will.  They are among the most luminous objects in the universe.  Aaaaand that's about as much as I understood of the Wikipedia article.

Q is for Q

Y'know, like from James Bond.

Q is for Quiver of Arrows

For any of my more pedantic readers, fine, it's not technically a weapon on its own.

Q is for Queen of Puddings

Q is for Queen Conch