Astronomers have found a new 100km diameter Trojan asteroid near Neptune.
Trojans are a type of asteroid found in space graveyards. They shed light on what the early Solar System was like.
Scientists say up to 150 similar objects could await discovery in the same area.
The new asteroid was discovered by Dr Scott Sheppard of the Carnegie Institution and Dr Chadwick Trujillo of the Gemini Observatory, Hawaii.
Meanwhile Kevin Yates, a scientist at the National Space Centre in Leicester, spends his time monitoring "near-Earth objects" to see if our eventual obliteration by an asteroid hitting Earth can be prevented.
Scientists believe that the massive six mile wide asteroids of the type that wiped out the dinosaurs only come around once every 100 million years.