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s*****t
发帖数: 1994 | 3 The Eagle Nebula for CFHT
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: Bright blue stars are still forming in the dark pillars of the Eagle Nebula. Made
famous by a picture from the Hubble Space Telescope in 1995, the Eagle Nebula shows the
dramatic process of star formation. To the upper right of the nebula in the above picture lies
the heart of the open cluster M16. The bright blue stars of M16 have been continually
forming over the past 5 milli |
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s*****t
发帖数: 1994 | 4 The Eagle Nebula for CFHT
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: Bright blue stars are still forming in the dark pillars of the Eagle Nebula. Made
famous by a picture from the Hubble Space Telescope in 1995, the Eagle Nebula shows the
dramatic process of star formation. To the upper right of the nebula in the above picture lies
the heart of the open cluster M16. The bright blue stars of M16 have been continually
forming over the past 5 milli |
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s*****t
发帖数: 1994 | 5 Galactic Supernova Remnant IC 443
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: About 8000 years ago, a star in our Galaxy exploded. Ancient humans might
have noticed the supernova as a temporary star, but modern humans can see the expanding
shell of gas even today. Pictured above, part of the shell of IC 443 is seen to be composed of
complex filaments, some of which are impacting an existing molecular cloud. Here emission
from shock-excited molecu |
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s*****t
发帖数: 1994 | 6 IC 5146: The Cocoon Nebula
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: How did this nebula get created? The Cocoon Nebula, cataloged as IC 5146, is
a strikingly beautiful nebula located about 4,000 light years away toward the constellation of
Cygnus. Inside the Cocoon is a newly developing open cluster of stars. Like other stellar
nurseries, the Cocoon Nebula is, at the same time, an emission nebula, a reflection nebula,
and an absorption nebula. |
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s*****t
发帖数: 1994 | 7 M17: Omega Nebula Star Factory
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: In the depths of the dark clouds of dust and molecular gas known as M17, stars
continue to form. The similarity to the Greek letter capital Omega gives the molecular cloud
its popular name, but the nebula is also known as the Swan Nebula, the Horseshoe Nebula, and
M17. The darkness of these molecular clouds results from background starlight being
absorbed by thick carbon-b |
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w****l
发帖数: 344 | 8 欧米伽星云M17
Credit: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
说明: M17是一个尘埃与分子气体聚集的暗云，也是一个恒星不断诞生的地方。由于
外型类似于希腊字母W，因而又得到了欧米伽星云的称号，也有人把它称为天鹅星云
或马蹄星云。这些分子云之所以黯淡无光是因为其如烟般大小的浓密碳基尘埃吸收了
背景光线所致。然而当明亮的大质量恒星形成时，会发出强烈而能量充沛的光线并慢
慢蒸散掉裹住它们的黑暗外衣。M17 自身约 20 光年大小，距离我们约5000光年，用
双筒望远镜朝人马座就可看到它。
原文来自： http://antwrp.gsfc.nasa.gov/apod/ap021210.html (linq编译) |
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u***************r
发帖数: 11227 | 9 M11: 野鴨星團 (The Wild Duck Cluster)
影像版權與提供: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
說明: 許多和我們太陽很類似的恆星多是誕生在疏散星團裡。 上面影像中的疏散星
團稱為M11，它具有數千顆成員星，和我們的距離略微超過五千光年。 這個星團內的
恆星大約是在二億五千年前形成的，所以M11還擁有許多年輕的藍色亮星。 疏散星團
也稱為銀河星團，它們成員星的數量比球狀星團少，不過成員的年齡較年輕。 此外
，疏散星團通常位在我們銀河系的盤面上，這一點也和球狀星團很不同。 M11位在南
天的盾牌座 (Scutum)內，用雙筒望遠鏡就能看見它。 |
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s*****t
发帖数: 1994 | 10 M101: The Pinwheel Galaxy
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: Why do many galaxies appear as spirals? A striking example is M101, shown
above, whose relatively close distance of about 22 million light years allow it to be studied in
some detail. Recent evidence indicates that a close gravitational interaction with a
neighboring galaxy created waves of high mass and condensed gas which continue to orbit the
galaxy center. These waves compr |
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s*****t
发帖数: 1994 | 11 Spiral Galaxy NGC 253 Almost Sideways
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: NGC 253 is a normal spiral galaxy seen here almost sideways. It is the largest
member of the Sculptor Group of Galaxies, the nearest group to our own Local Group of
Galaxies. NGC 253, pictured above, appears visually as one of the brightest spirals on the sky,
and is easily visible in southern hemisphere with a good pair of binoculars. The type Sc galaxy
is about 10 |
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s*****t
发帖数: 1994 | 12 In the Center of the Virgo Cluster
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: The Virgo Cluster of Galaxies is the closest cluster of galaxies to our Milky
Way Galaxy. The Virgo Cluster is so close that it spans more than 5 degrees on the sky - about
10 times the angle made by a full Moon. It contains over 100 galaxies of many types -
including spiral, elliptical, and irregular galaxies. The Virgo Cluster is so massive that it is
noticeably pull |
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s*****t
发帖数: 1994 | 13 Galactic Supernova Remnant IC 443
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: About 8000 years ago, a star in our Galaxy exploded. Ancient humans might
have noticed the supernova as a temporary star, but modern humans can see the expanding
shell of gas even today. Pictured above, part of the shell of IC 443 is seen to be composed of
complex filaments, some of which are impacting an existing molecular cloud. Here emission
from shock-excited molecu |
|
s*****t
发帖数: 1994 | 14 IC 5146: The Cocoon Nebula
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: How did this nebula get created? The Cocoon Nebula, cataloged as IC 5146, is
a strikingly beautiful nebula located about 4,000 light years away toward the constellation of
Cygnus. Inside the Cocoon is a newly developing open cluster of stars. Like other stellar
nurseries, the Cocoon Nebula is, at the same time, an emission nebula, a reflection nebula,
and an absorption nebula. |
|
s*****t
发帖数: 1994 | 15 M17: Omega Nebula Star Factory
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: In the depths of the dark clouds of dust and molecular gas known as M17, stars
continue to form. The similarity to the Greek letter capital Omega gives the molecular cloud
its popular name, but the nebula is also known as the Swan Nebula, the Horseshoe Nebula, and
M17. The darkness of these molecular clouds results from background starlight being
absorbed by thick carbon-b |
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w****l
发帖数: 344 | 16 欧米伽星云M17
Credit: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
说明: M17是一个尘埃与分子气体聚集的暗云，也是一个恒星不断诞生的地方。由于
外型类似于希腊字母W，因而又得到了欧米伽星云的称号，也有人把它称为天鹅星云
或马蹄星云。这些分子云之所以黯淡无光是因为其如烟般大小的浓密碳基尘埃吸收了
背景光线所致。然而当明亮的大质量恒星形成时，会发出强烈而能量充沛的光线并慢
慢蒸散掉裹住它们的黑暗外衣。M17 自身约 20 光年大小，距离我们约5000光年，用
双筒望远镜朝人马座就可看到它。
原文来自： http://antwrp.gsfc.nasa.gov/apod/ap021210.html (linq编译) |
|
u***************r
发帖数: 11227 | 17 M11: 野鴨星團 (The Wild Duck Cluster)
影像版權與提供: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
說明: 許多和我們太陽很類似的恆星多是誕生在疏散星團裡。 上面影像中的疏散星
團稱為M11，它具有數千顆成員星，和我們的距離略微超過五千光年。 這個星團內的
恆星大約是在二億五千年前形成的，所以M11還擁有許多年輕的藍色亮星。 疏散星團
也稱為銀河星團，它們成員星的數量比球狀星團少，不過成員的年齡較年輕。 此外
，疏散星團通常位在我們銀河系的盤面上，這一點也和球狀星團很不同。 M11位在南
天的盾牌座 (Scutum)內，用雙筒望遠鏡就能看見它。 |
|
s*****t
发帖数: 1994 | 18 M101: The Pinwheel Galaxy
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: Why do many galaxies appear as spirals? A striking example is M101, shown
above, whose relatively close distance of about 22 million light years allow it to be studied in
some detail. Recent evidence indicates that a close gravitational interaction with a
neighboring galaxy created waves of high mass and condensed gas which continue to orbit the
galaxy center. These waves compr |
|
s*****t
发帖数: 1994 | 19 Spiral Galaxy NGC 253 Almost Sideways
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: NGC 253 is a normal spiral galaxy seen here almost sideways. It is the largest
member of the Sculptor Group of Galaxies, the nearest group to our own Local Group of
Galaxies. NGC 253, pictured above, appears visually as one of the brightest spirals on the sky,
and is easily visible in southern hemisphere with a good pair of binoculars. The type Sc galaxy
is about 10 |
|
s*****t
发帖数: 1994 | 20 In the Center of the Virgo Cluster
Credit & Copyright: Jean-Charles Cuillandre (CFHT), Hawaiian Starlight, CFHT
Explanation: The Virgo Cluster of Galaxies is the closest cluster of galaxies to our Milky
Way Galaxy. The Virgo Cluster is so close that it spans more than 5 degrees on the sky - about
10 times the angle made by a full Moon. It contains over 100 galaxies of many types -
including spiral, elliptical, and irregular galaxies. The Virgo Cluster is so massive that it is
noticeably pull |
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a*j
发帖数: 12 | 21 http://www.ifa.hawaii.edu/mko/telescope_table.htm
Mauna Kea Telescopes
Optical/Infrared
UH 0.6m UH 0.6-m telescope 0.6m University of Hawaii 1968
UH 2.2m UH 2.2-m telescope 2.2m University of Hawaii 1970
IRTF NASA Infrared Telescope Facility 3.0m NASA 1979
CFHT Canada-France-Hawaii Telescope 3.6m Canada/France/UH 1979
UKIRT United Kingdom Infrared Telescope 3.8m United Kingdom 1979
Keck I W. M. Keck Observatory 10m Caltech/University of California 1992
Keck II W. M. Keck Observatory |
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a****y
发帖数: 1035 | 22 http://news.xinhuanet.com/tech/2012-11/16/c_123960141.htm
北京时间11月16日消息，据英国《每日邮报》报道，天文学家们首次发现一颗不围绕任
何恒星运转，而是在宇宙中自由飘荡的“流浪行星”。
对于这项发现，天文学家们显得毫不意外，因为他们早就已经猜测其存在，并且已
经花费超过10年以上的时间试图找到这样的一颗流浪行星。当然这样的搜寻将是极为困
难的，它常常会被人们形象地描述为“在几千个柴火堆里找一根绣花针”。天文学家们
猜测这颗孤独的行星可能是在其形成之初便被抛了出去，它现在不属于任何一个恒星，
自由流浪于距离地球约100光年的空间之中。
加拿大蒙特利尔大学和研究人员和他们在欧洲的同事们使用加拿大-法国-夏威夷望
远镜(CFHT)和欧洲南方天文台的甚大望远镜(VLT)获取的数据做出了这项重要的发现。
伊塔尼·阿提高(Itienne Artigau)是蒙特利尔大学的一名天体物理学家，她表示：“
尽管理论学家们早已猜测这种低温的年轻行星体的存在，但直到今天之前我们还从未实
际发现任何这类行星。”
由于其近旁没有恒星的巨大光芒掩盖，科学... 阅读全帖 |
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a*j
发帖数: 12 | 23 http://www.ifa.hawaii.edu/mko/telescope_table.htm
Mauna Kea Telescopes
Optical/Infrared
UH 0.6m UH 0.6-m telescope 0.6m University of Hawaii 1968
UH 2.2m UH 2.2-m telescope 2.2m University of Hawaii 1970
IRTF NASA Infrared Telescope Facility 3.0m NASA 1979
CFHT Canada-France-Hawaii Telescope 3.6m Canada/France/UH 1979
UKIRT United Kingdom Infrared Telescope 3.8m United Kingdom 1979
Keck I W. M. Keck Observatory 10m Caltech/University of California 1992
Keck II W. M. Keck Observatory |
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