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Glossary term: Conjunction

Description: When two astronomical objects are lined up from the perspective of an observer, occupying the same, or at least very similar, positions in the sky, they are said to be in conjunction. The conjunction does not need to be actually visible – for instance, the Moon and the Sun are approximately lined up whenever there is a new Moon, but we cannot see the Moon under those conditions, unless there is a solar eclipse. In that case, and whenever a conjunction is so close that one object appears to cover the other, we talk about a transit or eclipse.

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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".