Rare Green Comet Nishimura Set to Dazzle Earth's Skies

A rare green comet named Nishimura, discovered by an amateur Japanese astronomer, will be visible in the Northern Hemisphere for the first time in over 400 years. The half-mile-sized comet will pass within 78 million miles of Earth on September 12. To spot the comet, observers will need to wake up before dawn, look north near the constellation Leo, and use binoculars. The comet is expected to survive its passage near the sun and may be visible to people in the Southern Hemisphere by the end of September.