Полное лунное затмение, которое происходит в текущем году во второй и последний раз, началось в субботу в 15.33 мск, когда Луна коснулась полутени Земли.
Затмение от начала и до конца смогут увидеть жители Азии, Австралии, северо-западных регионов Северной Америки. В европейской части России затмение будет видно после заката, когда уже начнется его полная фаза, передает РИА «Новости».
Полной фазы, когда земная тень целиком закроет лунный диск, затмение достигнет в 18.06 мск. Полная фаза продлится 51 минуту. Полностью Луна выйдет из земной полутени в 21.30 мск.
С момента входа в полутень Луна постепенно начинает «заливаться кровью», краснеть. Это явление связано с тем, что солнечные лучи, проходя через слои земной атмосферы, преломляются, как сквозь призму. Большая часть коротковолнового голубого и синего излучения поглощается, а длинные красные и оранжевые проходят - они-то и окрашивают Луну в багрово-красный цвет. Вместе с тем на диске Луны можно заметить и бирюзовый оттенок.
Оттенок, в который окрашивается земной спутник, может сильно меняться год от года - это зависит от количества пыли в стратосфере. Если в атмосфере много пыли, например, от извержений вулканов, Луна становится темнее.
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» #1 написал: VP (12 декабря 2011 10:43) Статус: |
TOTAL LUNAR ECLIPSE: Yesterday, sky watchers across the Pacific side of Earth witnessed a total eclipse of the Moon. During its transit through Earth's shadow, the Moon turned a bright copper color. The hue was meaningful to scientists who monitor lunar eclipses as part of their research on climate change. More on that below, but first regard this snapshot taken by James Barclay of Maidenwell, Queensland, Australia:
"The Moon looked like some alien planet hanging in a star-studded sky," says Barclay. "The excitement of those who witnessed this event will never be forgotten."
Atmospheric scientist Richard Keen of the University of Colorado watched the event from Hawaii: "We had a fine warm morning for the eclipse here near Hale'iwa on Oahu'a North Shore. The eclipse was accompanied by the thunder of surf from the Banzai Pipeline, where later in the day surfers competed for the perfect ride," he says.
Keen wasn't just enjoying the view; he was also analyzing the event for scientific purposes. Lunar eclipses offer a unique way to assess the global dustiness of Earth's stratosphere. The scattering action of dust casts a red light into Earth's shadow. Lots of dust yields a deep red eclipse, while less dust produces a bright coppery hue.
The bright copper color of yesterday's eclipse suggests that the stratosphere is relatively clear. "My preliminary measurement of the brightness of the eclipse is magnitude -2.5 at mid-eclipse," says Keen. "It appears the clear stratospheric conditions of recent years is continuing."
This is important because the stratosphere affects climate; a clear stratosphere "lets the sunshine in" to warm the Earth below. At a 2008 SORCE conference Keen reported that "The lunar eclipse record indicates a clear stratosphere over the past decade, and that this has contributed about 0.2 degrees to recent warming."
The stratosphere has another effect on lunar eclipses. Note the soft blue colors in this picture from Shahrin Ahmad of Teluk Kemang, Malaysia:
This is the "turquoise fringe" often seen during total lunar eclipses. Keen explains: "Light passing through the upper stratosphere penetrates the ozone layer, which absorbs red light and actually makes the passing light ray bluer. This can be seen as a soft blue fringe around the red core of Earth's shadow."
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TOTAL LUNAR ECLIPSE: Yesterday, sky watchers across the Pacific side of Earth witnessed a total eclipse of the Moon. During its transit through Earth's shadow, the Moon turned a bright copper color. The hue was meaningful to scientists who monitor lunar eclipses as part of their research on climate change. More on that below, but first regard this snapshot taken by James Barclay of Maidenwell, Queensland, Australia:
"The Moon looked like some alien planet hanging in a star-studded sky," says Barclay. "The excitement of those who witnessed this event will never be forgotten."
Dec. 10th Total Lunar Eclipse Gallery
Atmospheric scientist Richard Keen of the University of Colorado watched the event from Hawaii: "We had a fine warm morning for the eclipse here near Hale'iwa on Oahu'a North Shore. The eclipse was accompanied by the thunder of surf from the Banzai Pipeline, where later in the day surfers competed for the perfect ride," he says.
Keen wasn't just enjoying the view; he was also analyzing the event for scientific purposes. Lunar eclipses offer a unique way to assess the global dustiness of Earth's stratosphere. The scattering action of dust casts a red light into Earth's shadow. Lots of dust yields a deep red eclipse, while less dust produces a bright coppery hue.
The bright copper color of yesterday's eclipse suggests that the stratosphere is relatively clear. "My preliminary measurement of the brightness of the eclipse is magnitude -2.5 at mid-eclipse," says Keen. "It appears the clear stratospheric conditions of recent years is continuing."
This is important because the stratosphere affects climate; a clear stratosphere "lets the sunshine in" to warm the Earth below. At a 2008 SORCE conference Keen reported that "The lunar eclipse record indicates a clear stratosphere over the past decade, and that this has contributed about 0.2 degrees to recent warming."
The stratosphere has another effect on lunar eclipses. Note the soft blue colors in this picture from Shahrin Ahmad of Teluk Kemang, Malaysia:
This is the "turquoise fringe" often seen during total lunar eclipses. Keen explains: "Light passing through the upper stratosphere penetrates the ozone layer, which absorbs red light and actually makes the passing light ray bluer. This can be seen as a soft blue fringe around the red core of Earth's shadow."