Glossary term: 季节
Description: 地轴与地球绕太阳运行的轨道并不垂直，而是倾斜 23.4 度。因此，在一天中的某个特定时间，太阳在天空中的视位置随着一年四季变化。平均而言，当太阳在天空中的位置较高时，就会有更多的阳光照射到单位面积的地面上。在一年中，这导致了某些时间段更为温暖或凉爽，这一现象在远离地球赤道的地区更为明显，这就是所谓的季节。北半球的四季与南半球的四季相反：当北半球最大程度地向着太阳倾斜时，就是北半球的夏季，也是南半球的冬季，此时南半球远离太阳倾斜；反之亦然。地球上靠近赤道的许多地区的季节与温带和北极地区的夏冬模式不同。值得注意的是，每个季节的持续时间、开始和结束可能会受到文化习俗和时间段的影响。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of 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".
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