ALT A close-up photo of the Moon, which is about three-quarters full; its left side is in shadow. Its gray seas and circular impact craters are clearly visible. Near the center of the image, the International Space Station can just barely be seen passing in front of the Moon. Credit: NASA/Joel Kowsky

ALT A reddish Moon, with clouds passing in front of it, floats above a quickly-moving subway train at night. Credit: NASA/Bill Ingalls

ALT A large, golden Moon, partially shrouded by light clouds, hangs above the peak of the Washington Monument, which is covered in scaffolding. Credit: NASA/Bill Ingalls

ALT A remote camera image of the first flight of the United Launch Alliance (ULA) Vulcan rocket as it lifts off its launch platform. The white rocket in the center of the image has the ULA logo and the American flag painted along its length, and sparks and fire emanate from its base. Its metal gantry to the left, and the road in the foreground are illuminated by the fire’s glow. Credit: United Launch Alliance

ALT A supermoon sets over the Martin Luther King, Jr. Memorial in Washington. The 30-foot-tall granite statue of the American civil rights leader gazes into the distance. In the background, the night sky is illuminated by the bright reflection of the Moon. Credit: NASA/Aubrey Gemignani

ALT The Lunar Rover parked in its final position to televise the lift off of Apollo 17 from the Moon. The rover is white, sky is black space, and the surroundings are gray rolling hills. The Lunar Module can be seen in the distant background.