Details: Because it orbits the Earth outside of the atmosphere and its distorting effects, the Hubble Telescope—one of NASA's longest-lasting and most successful missions—provides high-resolution images of cosmic phenomena. Each of this calendar's 12 dazzling images is accompanied by a description of the celestial phenomenon depicted. Important dates in the history of space exploration, as well as current astronomical events, are noted throughout. & For over two decades, astronomers have used the Hubble Space Telescope to make and confirm a range of discoveries—from the existence of dark matter to the age of the universe. This calendar's 12 Hubble images are paired with concise descriptions of the celestial phenomena depicted. Also noted are important dates in the history of space exploration, as well as current astronomical events.