By doubling the number of known "dark comets," astronomers have been able to split them into two camps depending on their location in the solar system.

Astronomers discover 7 new 'dark comets,' but what exactly are they?

Source: space
Source Link: https://www.space.com/the-universe/comets/astronomers-discover-7-new-dark-comets-but-what-exactly-are-they