Jupiter likely formed in the outer reaches of the Solar System, and migrated inward to its current position billions of years ago, according to new computer simulations from Lund University in Sweden. Two groups of asteroids, called Trojans, follow the giant planet in its journey around the Sun. The distribution of these bodies can only be explained if Jupiter was once four times more distant from the Sun than it is today, researchers discovered. In 2021, NASA will launch the Lucy mission to the Trojan asteroids, in order to learn more about the ancient Solar System.Read More Are you Trying to Suggest that Jupiter Migrates?
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