APOD:2015.9.27

Sweet丿Kim (金) 天王星
36 10 2
发表于:2015-09-29 12:58 [只看楼主] [划词开启]

今晚的超级满月食 

【非常抱歉!这次的图加载不出来啊,喵~}

影片提供:

 NASA's GSFC, David Ladd (USRA) & Krystofer Kim (USRA)

说明:

 在今晚,明亮的满月会变身为黯淡的红月。今晚的月亮会特别明亮,是因为满相是出现在绕地球椭圆轨道上相对接近地球的位置。在大小和亮度上,今晚的满月带着超级满月的称号;不过“超级”的襃称也许有些过当,因为和一般的满月比起来,它只不过大上和亮上几个百分点而已。而我们的月亮之所以会化身为黯淡的红月,只因它经历了一次月全食,形成月盘完全淹没在地球暗影内的天象。而此时的暗红色泽,则源自地球大气所散射的太阳红光远多于太阳蓝光。


今晚的月亮也称为获月,因为它是最靠近秋分的满月,而此时恰好是地球北半球秋收的季节。超级满月带食相对罕见,上次的超级满月食出现在1982年,下次则要等到2033年。今晚的超级满月全食持续超过1小时,最佳观测地点为日落后的北美洲、子夜的南美洲与日出前的西欧。


http://spaceweathergallery.com/eclipse_gallery.html

_________________________________________________________________________


Tonight: A Supermoon Lunar Eclipse 

Video Credit: NASA's GSFC, David Ladd (USRA) & Krystofer Kim (USRA)

Explanation: Tonight a bright full Moon will fade to red. Tonight's moon will be particularly bright because it is reaching its fully lit phase when it is relatively close to the Earth in its elliptical orbit. In fact, by some measures of size and brightness, tonight's full Moon is designated a supermoon, although perhaps the "super" is overstated because it will be only a few percent larger and brighter than the average full Moon. However, our Moon will fade to a dim red because it will also undergo a total lunar eclipse -- an episode when the Moon becomes completely engulfed in Earth's shadow. The faint red color results from blue sunlight being more strongly scattered away by the Earth's atmosphere. Tonight's moon can also be called a Harvest Moon as it is the full Moon that occurs closest to the September equinox, a time signaling crop harvest in Earth's northern hemisphere. Total eclipses of supermoons are relatively rare -- the last supermoon lunar eclipse was in 1982, and the next will be in 2033. Tonight's supermoon total eclipse will last over an hour and be best visible from eastern North America after sunset, South America in the middle of the night, and Western Europe before sunrise.


最后编辑于:2015-09-29 13:01

本帖来源社刊

分类: 宇宙观光属
全部回复 (10) 回复 反向排序

  • 2

    点赞

  • 收藏

  • 扫一扫分享朋友圈

    二维码

  • 分享

课程推荐

需要先加入社团哦

编辑标签

最多可添加10个标签,不同标签用英文逗号分开

保存

编辑官方标签

最多可添加10个官方标签,不同标签用英文逗号分开

保存
知道了

复制到我的社团