What are the boundaries and limitations of our universe? How did it all begin, and what majestic and eerie phenomena lurk within its vast shadows? From the mechanics of gravity assist and rogue super massive black holes to the quantum frontiers of Superstring and M-theory, cosmic ghost particles, and wormhole shortcuts, this book sweeps the cover off the deep cosmos. Aimed at providing minds hungry for discovery with exactly what they want, Mysteries of the Unknown bridges basic astronomy and advanced theoretical physics into an accessible, fascinating journey across deep space and time.