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Glossary term: Trojans

Description: Trojans are asteroids which orbit the Sun with the same orbit as one of the major planets, but are either one sixth of an orbit ahead of the planet or one sixth of an orbit behind the planet. These points, ahead of the planet and behind it are two special gravitational points where a small body can sit stably in its orbit without being kicked around by the gravity of the planet. The largest groups of trojans in the Solar System are those which share an orbital path with Jupiter. Those which lie 60 degrees ahead of Jupiter are named after mythical Greek characters from the Trojan War. Those which are 60 degrees behind Jupiter are named after Trojan characters.

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Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".