江涛 发表于 2008-1-13 22:54

17P再续——不需任何望远镜

Long-fading Comet 17P/Holmes is still visible to the naked eye. Toni Scarmato sends this photo from Calabria, Italy. "I estimate its visual magnitude to be +3.5." This means the comet is easy to see from the dark countryside (look straight up after sunset) but a challenge from cities.

"Standing inside that church, looking up into the sky to see the stars, planets and a comet felt really special," he says. The photo required no telescope, just an off-the-shelf Canon Digital Rebel XT.

http://www.spaceweather.com/comets/holmes/11jan08/P-M-HedAcn1_strip.jpg


from spaceweather

孔方 发表于 2008-1-13 23:05

the comet is easy to see from the dark countryside (look straight up after sunset) but a challenge from cities.
——————————————
这恰恰是最大的问题……

活动星图 发表于 2008-1-13 23:11

楼主没有收到我的信？

bobanne 发表于 2008-1-14 00:21

原帖由 孔方 于 2008-1-13 23:05 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
the comet is easy to see from the dark countryside (look straight up after sunset) but a challenge from cities.
——————————————
这恰恰是最大的问题……
是啊 这条件不好找哦yct56.gif

江涛 发表于 2008-1-14 13:09

原帖由 活动星图 于 2008-1-13 23:11 发表 http://www.astronomy.com.cn/bbs/images/common/back.gif
楼主没有收到我的信？
什么信？？::luguo::

活动星图 发表于 2008-1-14 13:31

站内信。

算了，我在这再发一次，算公开信了。

发帖时把原图所在页面的链接也发出来，如果有译文也说明译文所在页面的链接，以方便所有人查找原图原文。

江涛 发表于 2008-1-14 21:08

好，知道了。。。。::luguo::

choudeku 发表于 2008-1-14 21:38

页: [1]
查看完整版本: 17P再续——不需任何望远镜