首页
关于人生天地间
Search
1
2021年09月08日:仙女大星系方向的深空影像-(The Deep Sky Toward Andromeda)
37 阅读
2
欢迎来到人生天地间
26 阅读
3
2017年11月29日:M42:猎户座大星云-(M42: The Great Orion Nebula)
25 阅读
4
2017年08月06日:银河与炸裂的流星-(Milky Way and Exploding Meteor)
13 阅读
5
2024年02月11日:直指月亮的火箭烟尘影子-(Rocket Plume Shadow Points to the Moon)
11 阅读
默认分类
每日天文图
登录
Search
标签搜索
地球
太阳
尘埃
银河系
光年
dust
Sun
哈伯太空望远镜
影像
Hubble Space Telescope
火星
主题影像
Earth
Milky Way Galaxy
上图
木星
土星
美国
太阳系
人生天地间
累计撰写
10,537
篇文章
累计收到
1
条评论
首页
栏目
默认分类
每日天文图
页面
关于人生天地间
搜索到
2
篇与
的结果
2019-08-05
2019年08月05日:全食日与倒影-(A Total Solar Eclipse Reflected)
2019年08月05日:全食日与倒影-(A Total Solar Eclipse Reflected)--原图下载{mtitle title="全食日与倒影"/}Image Credit & Copyright: Thierry Legault说明: 如果你看见日全食,你会进行双重摄影吗?一位天文摄影者借助了湖泊和一些规划工作,就真的进行了这项工作。当这位摄影者意识到食日会低悬在地平线附近时,他就开始在南美洲窄窄的全食带上,寻找能见到月亮和它的倒影完全遮住太阳的合适地点。在全食发生的前一天,他去了坡风湖,发现情况与湖名完全不搭,当地几乎无风,湖面更是平滑如镜。一切看来都很完美。不过在日食那天重回当地后,却发现强风掀起了涌浪,让拍摄日食倒影的希望滨临破灭。情况看来很绝望。不过很怪异的,在全食前一小时左右风势又渐渐变小。风会偃旗息鼓可能和日食有关,因为被月影覆盖的地面,加热空气的程度较低,热气流抬升的效应也会降低,从而导至风速降低或风向改变。所以当全食来临时,相机、三脚架和湖面全都就了定位。这幅呈现双日食的主题影像,来自一张曝光时间只有15之1秒的照片。全食阶段过后,风势很快的又重起,在湖面掀起波澜。不论如何,这幅记录2019年7月双日食的影像,就此写入了历史。{lamp/}原文:{mtitle title="A Total Solar Eclipse Reflected"/}Image Credit & Copyright: Thierry LegaultExplanation: If you saw a total solar eclipse, would you do a double-take?One astrophotographer did just that -- but it took a lake and a bit of planning.Realizing that the eclipse would be low on the horizon, he looked for a suitable place along the thin swath of South America that would see, for a few minutes, the Moon completely block the Sun, both directly and in reflection. The day before totality, he visited an Argentinelake called La Cuesta Del Viento (The Slope of the Wind) and, despite its name, found so little wind that the lake looked like a mirror. Perfect. Returning the day of the eclipse, though, there was a strong breeze churning up the water -- enough to ruin the eclipse reflection shot. Despair. But wait! Strangely, about an hour before totality, the wind died down. This calmness may have been related to the eclipse itself, because eclipsed ground heats the air less and reduces the amount rising warm air -- which can dampen and even change the wind direction. The eclipse came, his tripod and camera were ready, and so was the lake.The featured image of this double-eclipse came from a single exposure lasting just one fifteenth of a second.Soon after totality, the winds returned and the water again became choppy.No matter -- this double-image of the 2019 July total solar eclipse had been captured forever.
2019年08月05日
0 阅读
0 评论
0 点赞
2001-07-26
2001年07月26日:马达加斯加的日全食-(Madagascar Totality)
2001年07月26日:马达加斯加的日全食-(Madagascar Totality)--原图下载{mtitle title="马达加斯加的日全食"/}Credit & Copyright: Vic & Jen Winter /ICSTARS Astronomy, Inc.说明: 2001年6月21日,长长的月影降临到地球的南半球地面,产生了21世纪的第一个日全食。从大西洋开始,月亮的本影掠过南非洲和马达加斯加 (Madagascar)大岛,最后在日落时分的印度洋划下句点。日全食期间,月盘完全覆盖住日盘,让平常隐而不显的美丽日冕显现出来。在上面这张从马达加斯加南部所拍摄的照片里,还可以看到活跃期太阳的边缘,有许多大小和地球相当的粉红色日珥 (prominences)。在这张全食阶段起点时所拍的影像里,可以清楚看到最后的阳光穿过月表的凹地和山谷,形成了像是璀璨珠宝镶在粉红色指环的天文奇景。{lamp/}原文:{mtitle title="Madagascar Totality"/}Credit & Copyright: Vic & Jen Winter /ICSTARS Astronomy, Inc.Explanation: When the Moon's shadow reached out and touched Earth's southernhemisphere on 2001 June 21, the firsttotalsolar eclipse of the 21st century began.Starting in the Atlantic, the dark, central lunar shadow or umbratraced a path which crossed southern Africa and the large islandofMadagascar before ending at sunset in the Indian Ocean.Of course, as the lunar diskblocked the Sun the total phase offeredsplendid views of the elusive outer solar corona.But, as seen in this stunning telescopic view from southernMadagascar, it also revealed anactive solar limb bristling withpinkish, planet-sized prominences.Taken as totality began, this image of the last bright rays ofsunlight shining through dips and valleys in irregular lunarterrain gives the illusion of aglittering jewel set in a pink celestialring.
2001年07月26日
0 阅读
0 评论
0 点赞