Glossary term: Aquarius

Description: Aquarius is comparatively faint constellation of the Zodiac, the part of the sky that intersects with the ecliptic (the plane defined by the Earth's path around the Sun). Hence, from Earth, we can regularly find the Sun and also planets, in the constellation Aquarius. In the case of the Sun this occurs from late February to early March (at that time, of course, we cannot see the constellation's stars). Aquarius is one of the 88 modern constellations defined by the International Astronomical Union, but goes back much further – it was already one of the 48 constellations named by the 2nd century astronomer Claudius Ptolemy.

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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".