An artist's impression of the simultaneous stellar eclipse and planetary transit events on b. Such a double eclipse event is known as a syzygy. Any rocky moons orbiting the Jupiter-like planet could theoretically have liquid water.
2017 Astronomical Events Check out our calendar of some of astronomical events for sky watchers. Most of these natural occurrences can be observed with the naked eye but use a pair of binoculars or a telescope for best viewing.