 It should be an exciting weekend for stargazers. The moon will appear full for about three days starting Friday night through Monday morning. According to NASA, the Buck Moon, as it's known, gets its name because early summer is normally when the new antlers at Buck Deer push out of their foreheads and the coatings of velvety fur. But it's also got other names like the Thunder Moon due to frequent thunderstorms at this time of year. The moon will be at its fullest on Sunday morning.