MISSING a huge cloud of rocks? Try looking in Neptune’s orbit. There seem to be plenty there, if the tilt of an asteroid discovered in the planet’s orbit is anything to go by. The asteroids in the unseen cloud might even outnumber those in the main asteroid belt between Mars and Jupiter.
The asteroid was discovered by Scott Sheppard of the Carnegie Institution of Washington DC and Chadwick Trujillo of the Gemini Observatory in Hawaii. They used Carnegie’s Magellan-Baade 6.5-metre telescope in Chile and the 8.2-metre Gemini telescope. It is one of four “Trojan” asteroids, which orbit in lockstep with…
