... Jupiters Rings Revealed . ... Jupiter's rings were discovered in 1979 by the passing Voyager 1 spacecraft, but their origin was a mystery. Data from the Galileo spacecraft currently orbiting Jupiter later confirmed that these rings were created by meteoroid impacts on small nearby moons. MyCn18: An Hourglass Nebula . ... 55 Cancri: Familiar Planet Discovered . ... Previously, the waning Moon was best visible from all places on Earth during the early morning hours because it trailed the Sun. ...