Astronomers discover two populations of unusual dark comets in our solar system …
An artist's illustration shows the interstellar visitor 'Oumuamua venting gaseous material from its surface, as a comet would. NASA/ESA/Joseph Olmsted and Frank Summers, STScI
Astronomers have spotted seven new examples of a cosmic phenomenon known as dark comets that could help scientists determine whether the celestial bodies helped deliver vital elements like water to Earth early in the planet’s history.
The discovery doubles the known number of these mysterious celestial objects across our solar system that resemble asteroids but zip through space like comets, albeit without the “tail” comets are known for.
Source : https://www.cnn.com/2024/12/18/science/dark-comets-solar-system/index.html