获月的迹线

2021年9月23日

Harvest Moon Trail
Image Credit & Copyright: Mike Cohea

Explanation: Famed in festival, story, and song the best known full moon is the Harvest Moon. For northern hemisphere dwellers that’s a traditional name of the full moon nearest the September equinox. Seen from Saunderstown, Rhode Island, planet Earth, this Harvest Moon left a broad streak of warm hues as it rose through a twilight sky over the Newport Bridge. On September 20 its trail was captured in a single 22 minute exposure using a dense filter and a digital camera. Only two days later the September equinox marked a change of season and the beginning of autumn in the north. In fact, recognizing a season as the time between solstice and equinox, this Harvest Moon was the fourth full moon of the season, coming just before the astronomical end of northern summer.

Tomorrow’s picture: Perseid meteor outburst

获月的迹线
影像提供与版权: Mike Cohea

说明: 依据它们在节庆、传说和歌谣里的声名，最著名的满月会是获月。而对北半球的住民来说，它是传统上对离秋分最近的满月之称号。上面影像呈现从地球罗德岛州桑德斯敦看出去，所见到的今年获月，在暮光时分从新港桥的后方升起，曳出一道宽宽的暖橙色迹线。这幅摄于9月20日的影像，是由配置减光滤片的数位相机进行22分钟的长曝光之所得。出现在2天之后的秋分，则标志了季节的转换和北半球秋天的起点。如果以（夏）至到（秋）分的期间作为一季，那么出现在天文学北半球夏季终点之前的这轮获月，是今年夏季的第四个满月。

明日的图片: Perseid meteor outburst