Welcome, space cadet, to the Astro-Physicist's Glossary of Totally-Not-Completely-Not-Sure-About-It Terms! Where the boundaries of human understanding are pushed, stretched, and occasionally broken.
Dark Matter: That thing that's always lurking just out of sight, but you know it's there, man. Like your in-laws.
Black Hole: A cosmic void that's so dense, you'll get lost in it. Literally. Don't ask us how we know.
Gravitational Wave: That weird, wavy thing that's always making your pants fall down.
Quantum Superposition: When you're feeling both excited and bored at the same time. Like during a physics lecture.
Schrodinger's Cat: That cat that's simultaneously dead and alive, but mostly just napping.
More on Quantum Superposition...
And what's with all these cats, anyway?
See also: Dark Matter, Black Hole, Gravitational Wave, Wormholes,