OBX amazing america atlantic ocean barred spiral galaxy beach buxton cape hatteras cape hatteras national seashore coast coastlines danger dangerous dark dark matter east coast explore fresnel galatic center galaxy galileo galilei glowing graveyard of the atlantic gulf stream harbor hatteras hatteras island historic historic places hope island labrador current light light ray lighthouse maritime maritime pilots milky milkyway national parks navigation navigational aid nc night night sky north carolina north carolina outer banks ocean outer banks outside reefs safe safe harbor safety sailing sea seashore ships shoals solar solar system south south east stars storms tower universe