This spring, skywatchers have been treated to the captivating and unpredictable display of a new comet, called C/2025 F2 (SWAN). Discovered in late March 2025 through data from the SWAN instrument ...

If C/2025 N1 is an interstellar object, it joins a very select group. The first known interstellar object ever identified was ’Oumuamua (also known as 1I/2017 U1) on Oct. 19, 2017, by the Pan ...

The second, Comet 2I/Borisov, was spotted by amateur astronomer Gennady Borisov of Crimea on Aug. 30, 2019. It streaked through our solar system at 110,000 mph, according to NASA, and behaved more ...