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 weekend, on Friday, Oct. 18, ...

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

Comet Tsuchinshan-ATLAS (also known as C/2023 A3 and Comet A3) will be visible for the next few nights, and we only need to ...

The Virtual Telescope Project's livestream of the full Hunter's Moon supermoon and comet Tsuchinshan-ATLAS was postponed due ...

The Hunter's Moon of October 2024 will be the largest full moon of the year thanks to its proximity to Earth. The moon ...

If you’ve missed a glimpse of the bright comet streaking through the evening sky, it’s not too late to catch it again.

Tsuchinshan-ATLAS (C/2023 A3) | When was it first seen?

Quality planetarium software is essential to planning observations, especially for comets. Many software packages are ...

New photos of comet Tsuchinshan-ATLAS appear to show a faint "anti-tail" pointing away in the wrong direction. The puzzling extra limb is the result of a rare illusion that is only possible when our ...

The spherical shell known as the Oort Cloud is, for all practical purposes, invisible. Its constituent particles are spread so thinly, and so far from the light of any star, including the Sun, that ...