title: September equinox start: 2018-09-23 start time: 01:40 tags: Astronomie astronomy naked-eye sky links: Web link https://in-the-sky.org/news.php?id=20180923_07_100 description: Day and night have equal length, marking the beginning of autumn in the northern hemisphere and spring in the southern hemisphere. https://in-the-sky.org/news.php?id=20180923_07_100