A giant comet twice the size of Mount Everest is heading for Earth
June 30, 2022
https://interestingengineering.com/giant-comet-mount-everest-earth
The much anticipated Comet C/2017 K2 (PanSTARRS) has entered our inner solar system meaning it could soon be visible via a simple telescope. It's probably best to catch it at its closest approach to Earth on July 14, 2022, although a supermoon on July 13 may light up the sky, which means you may want to spot it now while the skies are still dark.
How big is the comet's nucleus?
Experts are unclear at this point about just how big the comet's nucleus is. According to NASA solar system ambassadors Eddie Irrizarry and Kelly Kizer Whitt, it is estimated that the comet falls between a range of 11 and 100 miles (18 and 161 kilometers) wide.
This means it could be considered just big or fall among the biggest comets ever discovered so far such as Hale-Bopp and Bernardinelli-Bernstein.