Glossary term: Orbital Period

Description: The orbital period is the time it takes for an object to make one complete orbit of another object. Another way of stating this is that it is the time it takes for an object to arrive back to the same point in its orbit. This could be a planet going around a central star (for example, Earth orbiting the Sun); it could be a moon orbiting around a planet; it could be a star, group of stars, or nebulae going around the center of a galaxy; it could be two (binary) stars orbiting their common center of mass.

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Term and definition status: This term and its definition have been approved by a research astronomer and a teacher

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".