... Apollo 16: Exploring Plum Crater . ... Apollo 16 spent three days on Earth's Moon in April 1972. The fifth lunar landing mission out of six, Apollo 16 was famous for deploying and using an ultraviolet telescope as the first lunar observatory, and for collecting rocks and data on the mysterious lunar highlands. In the above picture, astronaut John W. The North America Nebula . ... What does the center of our Milky Way Galaxy look like? ... Mir Dreams . ... The Iron Moon . ... April 2009 . ...