See the most amazing night sky photos of 2015 by amateur astronomers and stargazers around the world in our year-end gallery here. Solar eclipses, the moon and more wowed Space.com readers this year.
Comet C/2013 US10 (Catalina) was discovered on Oct. 31, 2013 by the Catalina Sky Survey. It reached perihelion on Nov. 15, 2015 and is currently visible in telescope views from Earth. See photos of the comet from stargazers here.