An article published in the journal “Astronomy & Astrophysics” reports the results of a research on the migration of the solar system’s gas planets and in particular on Jupiter’s movements. A team of researchers led by Simona Pirani, a graduate student in astronomy at the Swedish University of Lund, created a series of computer simulations to try to explain the asymmetry in Jupiter trojans, given that there are about are approximately 50 per cent more Trojans in front of Jupiter than behind it. The result is that such asymmetry may have occurred if Jupiter was formed at a distance from the Sun four times greater than its current one and then approached and attracted the asteroids asymmetrically.