Only discovered in 2023, Comet C/2023A3 Tsuchinshan-ATLAS is visible through the naked eye right now. It won't return for ...

The coma and long tail of comet Tsuchinshan-ATLAS, also called C/2023 A3 (Tsuchinshan–ATLAS), is currently shining at ...

Astronomy enthusiasts in the U.S. have had the chance to witness stunning celestial events recently. Highlights include a ...

The Oort Cloud is a theorized invisible spherical shell that surrounds the Sun.

How, when, and where to look to see Comet C/2023 A3 (Tsuchinshan-ATLAS) after sunset this Friday, Oct. 18, with sky charts, ...

How, when, and where to look to see Comet C/2023 A3 (Tsuchinshan-ATLAS) after sunset this weekend, on Friday, Oct. 18, ...

The ancient comet—dubbed the “comet of the century”—returns to the inner solar system only once every 80,000 years.

Discovered in January 2023, A3 reached the closest point in its orbit to the Sun, known as perihelion, on Sept. 27, followed ...

The best comet of the year is starting to fade in brightness, but it’s still an easy naked-eye object in the evening sky.

Dozens of people gathered at the 606 Bloomingdale Trail, 1805 N. Ridgeway Ave., Thursday night for an observation event ...

If you looked up at the sky tonight, you might’ve seen an “ancient” comet that won’t be seen again for tens of thousands of ...

Scientists found the Tsuchinshan–ATLAS comet in 2023. Now, it’s here and visible in our sky, even from Chicago. The comet won ...