While the movie Armageddon taught us to be afraid of doomsday asteroids, it’s actually comets that may pose a bigger threat, according to new research by the Royal Astronomical Society.
Astronomers from Armagh Observatory and the University of Buckingham have determined that giant comets known as centaurs, though typically traveling far from earth, could potentially be deflected toward the planet when traveling through the orbits of outer planets like Jupiter and Saturn. Centaurs are 50 to 100 kilometers across, meaning they can be bigger than all the asteroids that have been found to pass near Earth to date.
“If we are right, then these distant comets could be a serious hazard, and it’s time to understand them better,” University of Buckingham professor Bill Napier said in a statement.
The researchers calculate that a centaur should cross the Earth’s orbit once every 40,000 to 100,000 years. The comets disintegrate as they approach Earth, spreading dust and larger fragments that can still be multiple kilometers wide. Documented environmental upheavals in 10,800 B.C. and 2,300 B.C., as well the death of the dinosaurs 65 million years ago, may have been the result of centaurs.
- Volodymyr Zelensky and the Spirit of Ukraine: TIME's 2022 Person of the Year
- Mickey Guyton Is TIME's 2022 Breakthrough Artist of the Year
- The 10 Best Nonfiction Books of 2022
- Column: What Elon Musk Gets Wrong About Free Speech
- The Forgotten Story of One of the First U.S. Soldiers Killed Overseas After Pearl Harbor
- Why You're More Likely to Get Sick in the Winter, According to New Research
- Column: What the Protests Tell Us About China's Future
- 18 Last-Minute Gifts for Everyone on Your List
