NASA发布2026年9月天文观测指南，介绍当月天空景观的重要天文事件1。金星将在9月18日达到本月晚间出现时的最大亮度，成为夜空中最耀眼的天体1。
月球将在9月14日至20日引导观测者寻找心宿二（天蝎座红星）和茶壶星群（射手座），在晴朗地点还可见银河中心1。9月22日秋分到来，标志北半球秋季正式开始、南半球春季开始，此日昼夜长度接近相等1。此外，9月19日为国际观月夜1。
9月26日，丰收月将在土星和海王星附近升起1。值得注意的是，海王星视星等约8等，需借助双筒望远镜或望远镜才能观测1。
NASA has released an observing guide for September 2026, highlighting several celestial events that will grace the evening sky.1 Venus will reach its maximum brightness on September 18 during its evening appearance, making it one of the most striking objects visible to the naked eye.1
Between September 14 and 20, the Moon will serve as a useful guide for locating other notable features in the night sky, including Antares, the reddish star in Scorpius, and the Teapot asterism in Sagittarius, with the center of the Milky Way visible from dark locations.1 September 19 marks the International Observe the Moon Night.1 The autumnal equinox arrives on September 22 in the Northern Hemisphere, marking the beginning of fall and bringing nearly equal lengths of day and night, while simultaneously ushering in spring for the Southern Hemisphere.1
Later in the month, the Harvest Moon will rise near Saturn and Neptune on September 26.1 Neptune, however, will require binoculars or a telescope to observe, as its apparent magnitude of approximately 8 makes it invisible to the unaided eye.1
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