[专辑]每日天文一图-4月14日-四月的月亮和昴星团

四月的月亮和昴星团
在上周和太阳分开之后（指上周五的日食），四月的月亮优雅的挂在黄昏后的夜空。与这苗条的三天大的新月共享望远镜视野的，是附近的昴星团(The Pleiades)。在这张图上，月亮被太阳照亮的部分曝光过度，月亮的晨昏圈，或者说是月亮的日夜交界线则因为陨石坑和山脉而呈锯齿状。由于地球反照（Earthshine），即地球反射的太阳光照到月亮上，我们可以看到黑暗的月亮夜晚区域的表面特征。在右边，昴星团的几颗姐妹星聚在一起，她们那蓝色的反射星云，虽然通常在用望远镜所拍的照片中都很突出，但现在却被更为明亮的月光所掩盖了。（小海译）

April's Moon and the Pleiades
Credit & Copyright: Jerry Lodriguss (Catching the Light)
Explanation: After parting with the Sun late last week, April's moon graced the early evening sky. Its slender, three-day-old crescent shares this lovely telescopic skyview with the nearby Pleiades star cluster. Here, the Moon's sunlit crescent is overexposed while the lunar terminator, or boundary between lunar night and day, is jagged with craters and mountains. Lunar surface features can also be seen in the dim lunar night illuminated by earthshine - light from sunlit planet Earth. The sister stars of the Pleiades are grouped at the right, but their alluring blue reflection nebulae, usually highlighted in telescopic images of the cluster, are washed-out in the much brighter moonlight.

照片详细参数http://www.astropix.com/HTML/SHOWCASE/MOON_M45.HTM

上周五的日食
http://antwrp.gsfc.nasa.gov/apod/ap050411.html
http://www.astronomy.com.cn/bbs/viewtopic.php?t=37706

变化的月亮http://www.inconstantmoon.com/

新月（非常细）http://www.astropix.com/HTML/SHOWCASE/CRESCENT.HTM

昴星团的神话http://www.ras.ucalgary.ca/~gibson/pleiades/pleiades_myth.html

Machholz彗星和昴星团（可以看到蓝色反射星云）
http://antwrp.gsfc.nasa.gov/apod/ap050111.html

月亮和恒星http://antwrp.gsfc.nasa.gov/apod/ap010906.html
满月、湖水和狮子座流星雨http://antwrp.gsfc.nasa.gov/apod/ap021122.html
（展现了明亮的月光是如何掩盖它周围的星光的，正是所谓的月朗星稀吧）

顶！

好贴~