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An ancient visitor from the far reaches of our solar system is making a once-in-a-lifetime appearance. The Oort Cloud Comet, officially named C/2023 A3 Tsuchinshan-ATLAS, is set to pass by Earth for the first time in 80,000 years.

 This rare celestial event presents a unique opportunity for stargazers. The comet can be seen in the Northern Hemisphere from mid-October to early November.

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A Rare Appearance After 80 Millennia

The comet was simultaneously discovered in 2023 by the Tsuchinshan Observatory in China and by the Asteroid Terrestrial-impact Last Alert System (ATLAS) telescope in South Africa. 

It is believed to have last passed by Earth during a time when Neanderthals still roamed the planet. On Saturday, October 12, the comet will come within 44 million miles of Earth, marking its closest approach in its highly elliptical orbit.

According to NASA, the comet survived its perilous journey around the sun, passing its closest point to Earth on September 27.

At that time, scientists were uncertain if it would survive, since the intense heat from the sun threatened to break apart the comet’s icy body. Fortunately, the comet remained largely intact, allowing people in the Northern Hemisphere a chance to witness this rare astronomical event.

How to View the Oort Cloud Comet

Although the comet was visible in the Southern Hemisphere in September and early October, Northern Hemisphere viewers will have the best chance to see it from October 12 through mid-November. 

The comet should be easier to spot between October 14 and October 20, particularly in the western sky during twilight.

NASA's Bill Cooke, who leads the Meteoroid Environment Office at the Marshall Space Flight Center, recommends looking for the comet after sunset, low in the western sky.

For the best view, stargazers should find a location with a dark, unobstructed sky. Hills, trees, or buildings may block your view, so it’s essential to find a clear horizon.

Cooke also suggests using cell phone cameras or binoculars to help locate the comet. While it may be difficult to spot with the naked eye, modern cameras often have night or low-light modes that can capture faint celestial objects.

 "Comets are more fragile than people may realize," Cooke said, explaining that many comets break apart when they pass too close to the sun.