Wow, you did super-well, Krista! That first one of the bridge impresses me to the max! Coolest.
Did Richard tell you to use a SMALL aperture and LONG exposure for the starry-light-effect?
For that is the trick, 250Gimp: when you shoot at night, use a SMALL aperture (i.e. high number, such as f16 or f22) and long exposures with the camera firmly resting on a tripod (of course).