Skywatchers can catch a rare glimpse of Comet Lemmon this month, and it won't be back until around the year 3175. Here's how ...
The interstellar comet 3I/ATLAS is barreling toward its closest point to the sun as perihelion looms on Oct. 29. How different will it look when it reappears on the other side?
Halley's Comet (a celestial body made of dust, ice, and rock that orbits the sun) is a short-period comet that is consistently visible to the naked eye from Earth, appearing every 72–80 years. The ...