As Earth sweeps through the comet’s debris trail, the particles burn up in the atmosphere, resulting in the annual shower.

Source: https://www.digitaltrends.com/space/nasa-skywatching-tips-august-meteor-shower/

At the comet’s closest approach to Earth, observers can find it in the sky about 20 degrees away from the North Star in the faint constellation of Camelopardalis.

Source: https://bigislandnow.com/2023/01/23/rare-green-comet-commeth-after-50000-years-and-likely-never-will-return-again/

The comet’s green color is caused by diatomic carbon (C), but more detail can also be worked out.

Source: https://www.newyorker.com/science/elements/what-the-green-comet-tells-us-about-the-past-and-the-future

The Sun’s heat causes the comet’s ice to change to gases so the coma gets larger.

Source: https://www.siasat.com/comet-coming-near-earth-after-50-thousand-years-2495972/

Tomorrow, Feb. 1, will be the comet’s closest approach to the sun.

Source: https://lcctorch.com/look-north-for-a-rare-green-glow-from-comet-c/