Search for the Fabled Vulcanoids
Astronomers want to find all the asteroids that may be heading for an impact with Earth, so they’re searching for the legendary group of asteroids called “Vulcanoids” that may be circling the sun. We can’t see these asteroids, but we know they?re there because they effect Mercury’s orbit and make the planet wobble. In the 19th century, astronomers thought Mercury’s strange orbit must be caused by a hidden planet, which they called “Vulcan,” after the Roman god of fire. Astronomers now think hundreds of space rocks, up to 20 miles in diameter, can be found between Mercury and the sun. They could be pieces of a planet that broke apart millions of years ago, and if the orbit of one of them gets deflected, it could head our way.
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