... Venus: Just Passing By . ... Venus, the second closest planet to the Sun, is a popular way-point for spacecraft headed for the gas giant planets in the outer reaches of the solar system. ... Giant spinning clouds of gas, similar to Earth's tornadoes, have been found on the Sun. ... How can a round star make a square nebula? ... Three Dusty Stars . ... These separate radio images reveal three dusty debris disks surrounding three bright, young, nearby stars - evidence for solar systems in formation. ...