Astronomy Picture of the Day——月掩土星
Moon Occults Saturn
Image Credit & Copyright: Cory Schmitz
Explanation: Sometimes Saturn disappears.It doesn't really go away, though, it just disappears from view when our Moonmoves in front. Such a Saturnian eclipse was visible along a small swath ofEarth -- from Brazil to Sri Lanka -- near the end of last month. The featuredcolor image is a digital fusion of the clearest images captured by successivevideos of the event taken in red, green, and blue, and taken separately forSaturn and the comparative bright Moon. The exposures were taken from SouthAfrica just before occultation -- and also just before sunrise. When Saturnre-appeared on the other side of the Moon almost two hours later, the Sun hadrisen. This year, eclipses of Saturn by the Moon occur almost monthly, but,unfortunately, are visible only to those with the right location and with clearand dark skies.
月掩土星
有的时候，土星会消失不见。其实，它并不是真的消失，只是因为月球移动到它前面时，它便从地球的视野里消失了。就在上月底，从巴西到斯里兰卡的一小片带状区域可以看到月掩土星奇况。这幅彩色照片是由连续拍摄该景象的视频中最清晰的影像经过数字融合而成，这些影像分别拍摄了土星和相对明亮的月球，并呈现出红色、绿色和蓝色光泽。这些曝光影像拍摄于南非，就在掩星事件之前。大约两个小时后，当土星再次出现在月球的另一边时，太阳已经升起。今年，几乎每月都会发生一次月掩土星事件，但不幸的是，只有那些位于绝佳观测位置的人才能在在黑暗晴朗的天空下看到如此盛况。
近期文章：
Astronomy Picture of the Day——挪威上空的AZURE蒸汽示踪剂