New Trojan asteroid hints at huge Neptunian cloud 19:00 15 June 2006 NewScientist.com news service Kelly YoungThe four known Neptune Trojans are shown in their position 60 degrees ahead of Neptune. The known clusters of Trojan asteroids on either side of Jupiter are also shown (Illustration: Scott Sheppard) A newly discovered asteroid in Neptune's orbit indicates the existence of a much larger, but as-yet-unseen, cloud of rocks in that region. The asteroids in Neptune's orbit might even outnumber those in the main asteroid belt between Mars and Jupiter, the new research suggests." The asteroid was discovered by Scott Sheppard of...