NASA and FEMA are working together to devise strategies in case a massive asteroid or comet is found heading toward the Earth. Although asteroids hit our planet on a regular basis, few cause significant damage. In 2013, a meteor exploded over the city of Chelyabinsk in Russia, injuring 1,100 people. Roughly 66 million years ago, an asteroid the size of Mount Everest hit the Earth, ending the age of dinosaurs. Researchers do not currently know of any asteroid or comet headed on a collision course with our planet.Read More Is Earth Ready for the Next Asteroid Strike?
For several years, astronomers have known that rings of dust follow the planets Earth and Venus in their journeys around the Sun. Researchers have now found a similar ring of dust also accompanies Mercury in its orbit, much to the surprise of astronomers, who believed any system like this would be driven away by the Sun. Our own ring is produced by collisions between bodies in the asteroid belt between Mars and Jupiter, but computer simulations have shown the ring bonded with Venus is likely the result of a previously-unknown asteroid belt around the orbit of that planet.Read More What a Dusty Solar System We Have! Here’s What Astronomers Found Hiding in the Mess