Halley’s Comet and its clockwork 76-year orbit may be the most famous of its kind, but in July 2020, comet C/2020 F3, known as NEOWISE, has been dazzling skywatchers in the Northern Hemisphere, with a once-in-many-lifetimes appearance. We won’t see it again for another 6,800 years.No one knew this celestial phenomenon would make an appearance until NASA’s Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission first spotted it in late March. Measuring approximately three miles wide, the comet is visiting from the outer parts of the solar system. Its rare…
