2025年4月8日
Moon Visits Sister Stars
Image Credit: Cayetana Saiz
Explanation: Sometimes, the Moon visits the Pleiades. Technically, this means that the orbit of our Moon takes it directly in front of the famous Pleiades star cluster, which is far in the distance. The technical term for the event is an occultation, and the Moon is famous for its rare occultations of all planets and several well-known bright stars. The Moon’s tilted and precessing orbit makes its occultations of the Seven Sisters star cluster bunchy, with the current epoch starting in 2023 continuing monthly until 2029. After that, though, the next occultation won’t occur until 2042. Taken from Cantabria, Spain on April 1, the featured image is a composite where previous exposures of the Pleiades from the same camera and location were digitally added to the last image to bring up the star cluster’s iconic blue glow.
Jigsaw Challenge: Astronomy Puzzle of the Day
Tomorrow’s picture: cosmic jets
月亮拜访七姐妹
影像提供: Cayetana Saiz
说明: 有时候，月亮会拜访昴宿星团。意指在轨道上运行的月亮，通过著名、相对遥远的昴宿星团之前方。这种现象的专业术语为掩星，而月亮以其会掩过太阳系所有的行星及数颗著名的亮星而著称。由于月球轨道的倾斜与进动，造成月亮间歇式的掩食昴宿星团。目前这一波、从2023年到2029年，每个月月亮都会掩过昴宿星。下一波的月掩昴宿星团，得等到2042年才会再现。这幅摄于2025年4月1日的组合主题影像，拍摄地点为西班牙的 坎塔布里亚自治区。摄影者使用相同的相机于同一地点，先拍摄数张昴宿星团影像，然后再运用数位技术与最后的底图叠合，以凸显昴宿星团标志性的蓝色辉光。
拼图挑战: 每日天文学谜题
明日的图片: cosmic jets
