A strange class of space rock known as a "dark comet" has qualities of both asteroids and comets — and the hard-to-spot objects may pose a larger threat to Earth than we thought, according to ...

Nearly invisible “dark comets” may have been responsible for bringing much of the water found on Earth to our planet ages ago. However, they could also pose a very terrible threat to Earth ...

A new study suggests that up to 60% of near-Earth objects are dark comets, a nearly invisible hybrid object that behaves like a comet and an asteroid at the same time.

A recent study suggested that nearly 60% of all near-Earth objects are dark comets that may have been a part of much larger bodies in the main asteroid belt, a region of the solar system that lies ...

Scientists first suspected the existence of dark comets in a March 2016 study when they noted that the trajectory of asteroid 2003 RM had moved slightly from its expected orbit, which could not be ...

In our study, we found seven new dark comets, bringing the total to 14. Now that we’ve found more dark comets, we’ve noticed that they come in two flavors. Outer dark comets are larger ...

Inner dark comets are smaller – typically 1,000 feet in size – and on circular orbits close to the Earth. Outer dark comets, shown in red, have longer orbits than inner dark comets, shown in gray.

Dark comets, which are cross between an asteroid and comet, can make up as much as 60 percent of near-Earth objects.

A strange class of space rock known as a "dark comet" has qualities of both asteroids and comets — and the hard-to-spot objects may pose a larger threat to Earth than we thought, according to ...

A strange class of space rock known as a "dark comet" has qualities of both asteroids and comets — and the hard-to-spot objects may pose a larger threat to Earth than we thought, according to ...