Dark comets are a newly defined type of near-Earth object that resemble asteroids but behave like comets, exhibiting dynamic behaviors such as trajectory changes that suggest come

It’s only two years since known objects that look like asteroids and move like comets became numerous enough to get a name, and now we find there are two quite different categories.

The study also reveals that these mysterious objects fall into two distinct groups based on their orbit and size. With this latest discovery, scientists are learning more about dark comets and their potential for having delivered the building blocks of life to Earth.