The discovery resets our understanding of how ice behaves in the frigid vastness of deep space and could influence our ...

Recent observations have revealed carbon monoxide venting from the largest comet ever seen, providing clues about its origins ...

When the first interstellar comet ever seen in our solar system was discovered in 2017, one characteristic ... cosmic rays converted water to hydrogen in the comet's outer layers.

Size comparison of various comet nuclei. NASA, ESA, Zena Levy (STScI) Outside the nucleus is a porous, almost fluffy layer of ice, kind of like a snow cone.

Comets like Halley, which have been around before, are more predictable – but even there you never quite know the mix of layers that will be exposed. That means there is always a lot of ...

The heat from the Sun melts the comet’s layers, so the closer it gets, the better scientists can study its makeup. How Comet C/2022 E3 (ztf) Got Its Name.

Comet Encke suffered a disconnection event in 2007. ... CME stands for coronal mass ejection, which is an eruption from the outer layers of the sun that often accompanies a solar flare.

A comet is basically a dirty iceball composed of rock and ice. The classic image is of a bright "star" in the night sky with a long curved tail extending into space.