Skywatchers are in for a special treat this week as a rare comet, Comet Tsuchinshan-ATLAS, is set to pass by Earth before disappearing into the vast cosmos forever. Originally discovered in January 9, 2023, by astronomers at the Tsuchinshan Observatory in China, this comet has been visible for almost two years now. Observers in South Africa using the ATLAS telescope also spotted the comet about a month later. Comets, which are comprised of dust and ice, orbit the Sun and leave behind long tails, remnants from the early days of our solar system. Comet Tsuchinshan-ATLAS is no exception.
While most comets are too dim to see without a telescope, some, like Comet Tsuchinshan-ATLAS, can be seen with the naked eye. Originating from the Oort Cloud at the outer edges of the solar system, this comet may only pass by Earth once in a span of around 80,000 years. Michelle Nichols, the director of public observing at the Adler Planetarium in Chicago, warns that this comet may never return as it might be influenced by other objects' gravity, ultimately getting ejected from our solar system.
As for viewing opportunities, Comet Tsuchinshan-ATLAS will reach its closest point to Earth on October 12, coming within 44 million miles. The comet's brightest display is expected on the evening of October 9, when dust particles will reflect sunlight directly toward Earth, creating a dazzling appearance. This phenomenon, known as forward scattering, can potentially make the comet visible even during daylight.
If you're eager to catch a glimpse of this extraordinary event, keep an eye out for Comet Tsuchinshan-ATLAS as it graces our skies this week."Nichols expressed that witnessing the comet's visibility is a rare event worth seizing, as such occurrences are infrequent. The comet will be visible to the naked eye starting from October 9 and will remain so until the month's end. For the best view, experts recommend seeking out the darkest locations to observe the comet on the western horizon. If you wish to view the comet post-sunset, it will be situated low in the sky near the setting sun. While it may appear faint at this time, a telescope or binoculars can enhance the viewing experience. Despite a potential decrease in brightness after October 9, the comet will still be observable. Don't let this opportunity slip by, as you may not have another chance to witness this stunning comet in your lifetime."
