Comet Tsuchinshan-Atlas, which was discovered last year, passed over Berlin's sky on Wednesday night, wowing stargazers. It came from what’s known as the Oort Cloud well beyond Pluto. After making its closest approach about 44 million miles (71 million kilometers) of Earth, it won’t return for another 80,000 years — assuming it survives the trip. Comets are frozen leftovers from the solar system’s formation billions of years ago. They heat up as they swing toward the sun, releasing their characteristic streaming tails. The comet was visible from both the northern and southern hemispheres. Tsuchinshan-Atlas was named for the observatories in China and South Africa that spied it. October's supermoon is the closest of the year, and it also teamed up with Tsuchinshan-Atlas for a rare stargazing two-for-one. The third of four supermoons this year, it was 222,055 miles (357,364 kilometers) away Wednesday night, making it seem even bigger and brighter than in August and September. It will reach its full lunar phase today.