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SOHO/SWAN Ultraviolet Image of Comet Hale-Bopp Approaching the Sun A time series of 6 images of comet Hale-Bopp taken by the SWAN instrument on board SOHO in the ultraviolet light (110-180 nm), on January 4, February 2 and 18, March 4 and 16, and April 3, 1997, as the comet slowly approaches the Sun, and increases in brightness. Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and has an estimated diameter of about 40 km. In contrast, the hydrogen cloud is more than 100 million kilometers across, which makes it the largest object in the solar system. The analysis of SWAN data of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second during closest approach, forming its brilliant tail, until recently clearly visible in the night sky. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
SOHO/SWAN Ultraviolet I...
Image
 
Description SOHO/SWAN Ultraviolet Image of Comet Hale-Bopp Approaching the Sun A time series of 6 images of comet Hale-Bopp taken by the SWAN instrument on board SOHO in the ultraviolet light (110-180 nm), on January 4, February 2 and 18, March 4 and 16, and April 3, 1997, as the comet slowly approaches the Sun, and increases in brightness. Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and has an estimated diameter of about 40 km. In contrast, the hydrogen cloud is more than 100 million kilometers across, which makes it the largest object in the solar system. The analysis of SWAN data of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second during closest approach, forming its brilliant tail, until recently clearly visible in the night sky. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
Comet Hale-Bopp observed by SOHO/SWAN on April 3, 1997. False color image of the sky in the 110-180 nm spectral range made by the SWAN instrument on-board SOHO on April 3, 1997. The SWAN instrument observes the solar UV light which is back scattered by neutral hydrogen in the interplanetary medium. Comet Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and its size is estimated to be about 40 km of diameter. In contrast, the size of the hydrogen cloud is more than 100 million kilometers, which makes it the largest object in the solar system. The analysis of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second on this day. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
Comet Hale-Bopp observe...
Image
 
Description Comet Hale-Bopp observed by SOHO/SWAN on April 3, 1997. False color image of the sky in the 110-180 nm spectral range made by the SWAN instrument on-board SOHO on April 3, 1997. The SWAN instrument observes the solar UV light which is back scattered by neutral hydrogen in the interplanetary medium. Comet Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and its size is estimated to be about 40 km of diameter. In contrast, the size of the hydrogen cloud is more than 100 million kilometers, which makes it the largest object in the solar system. The analysis of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second on this day. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
Comet Hale-Bopp observed by SOHO/SWAN on April 3, 1997. False color image of the sky (in ecliptic coordinates) in the 110-180 nm spectral range made by the SWAN instrument on-board SOHO on April 3, 1997. The SWAN instrument observes the solar UV light which is back scattered by neutral hydrogen in the interplanetary medium. Comet Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and its size is estimated to be about 40 km of diameter. In contrast, the size of the hydrogen cloud is more than 100 million kilometers, which makes it the largest object in the solar system. The analysis of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second on this day. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
Comet Hale-Bopp observe...
Image
 
Description Comet Hale-Bopp observed by SOHO/SWAN on April 3, 1997. False color image of the sky (in ecliptic coordinates) in the 110-180 nm spectral range made by the SWAN instrument on-board SOHO on April 3, 1997. The SWAN instrument observes the solar UV light which is back scattered by neutral hydrogen in the interplanetary medium. Comet Hale-Bopp is clearly visible because of its huge hydrogen cloud produced by photo-dissociation of water vapor molecules evaporated from the solid nucleus. This nucleus is composed of ice and dust and its size is estimated to be about 40 km of diameter. In contrast, the size of the hydrogen cloud is more than 100 million kilometers, which makes it the largest object in the solar system. The analysis of the hydrogen cloud indicates that about 600 tons of ice are vaporized and ejected in space each second on this day. Credits: SOHO (SWAN consortium), ESA, NASA. SWAN: Service d'Aeronomie du CNRS (France), Finnish Meteorological Institute (Finland) SOHO is a project of international cooperation between ESA and NASA.
Grimsvotn Volcano Erupts
Grimsvotn Volcano Erupt...
Iceland?s Grimsvotn Vol...<a href="http://modis.gsfc.nasa.gov"></a><a href="http://terra.nasa.gov/"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210.367"></a><A href="http://rapidfire.sci.gsfc.nasa.gov" target="outlink"></A>
Terra- MODIS
 
Grimsvotn Volcano Erupts
Grimsvotn Volcano Erupt...
Iceland?s Grimsvotn Vol...<a href="http://modis.gsfc.nasa.gov"></a><a href="http://terra.nasa.gov/"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210.367"></a><A href="http://rapidfire.sci.gsfc.nasa.gov" target="outlink"></A>
Terra- MODIS
 
Grimsvotn Volcano Erupts
Grimsvotn Volcano Erupt...
Iceland?s Grimsvotn Vol...<a href="http://modis.gsfc.nasa.gov"></a><a href="http://terra.nasa.gov/"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2004307-1102/Iceland.A2004307.1210.367"></a><A href="http://rapidfire.sci.gsfc.nasa.gov" target="outlink"></A>
Terra- MODIS
 
Eruption of Anatahan
Eruption of Anatahan
As reported by the Saip...<a href="http://aura.gsfc.nasa.gov/index.html"></a><a href="http://www.jcet.umbc.edu/"></a>
Aura- OMI
 
Eruption of Santa Ana (Ilamatepec) Volcano
Eruption of Santa Ana (...
On October 1, 2005, El ...<a href="http://aura.gsfc.nasa.gov/index.html"></a><a href="http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=16820"></a><a href="http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=12854"></a><a href="http://www.jcet.umbc.edu/"></a>
Aura- OMI
 
Eruption of Anatahan
Eruption of Anatahan
Explosive volcanic erup...
Aura- OMI
 
Eruption of Anatahan
Eruption of Anatahan
Explosive volcanic erup...
Aura- OMI
 
Eruption of Anatahan
Eruption of Anatahan
Explosive volcanic erup...
Aura- OMI
 
Sierra Negra Erupts
Sierra Negra Erupts
On October 22, 2005, on...<a href="http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=13246"></a><a href="http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?img_id=13251"></a><a href="http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?topic=volcano"></a>
Aura- OMI
 
Fires in Western Russia
Fires in Western Russia
Many fires (red pixels)...<a href="http://modarch.gsfc.nasa.gov/" target="outlink"></a><a href="http://terra.nasa.gov/" target="outlink"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/gallery/?2002092-0402" target="outlink"></a><a href="http://rapidfire.sci.gsfc.nasa.gov/" target="outlink"></a>
Terra- MODIS
 
Moons and Bright Mars
Moons and Bright Mars
Earth
 
Media Type Image
A Green Flash from the Sun
A Green Flash from the ...
Earth
1992
 
Media Type Image
facet_when_year 1992
Driving Toward a Sun Halo
Driving Toward a Sun Ha...
Earth
 
Media Type Image
Aurigids from 47,000 Feet
Aurigids from 47,000 Fe...
Auriga
1911
 
Media Type Image
facet_when_year 1911
St. Petersburg, Russia as seen from STS-60
St. Petersburg, Russia ...
This wintertime photogr...
2007-11-15 0:0:0
Image
 
International Space Sta...
2006-01-12 0:0:0
 
Description ISS011-E-12415 (31 August 2005) --- Aurora Borealis and lights in Finland, Russia, Estonia and Latvia are featured in this digital still picture taken by the Expedition 11 crew aboard the International Space Station. If it were daylight parts of the Eastern Baltic Sea would be visible. The station was over a point on Earth located at 50.6 degrees north latitude and 15.1 degees east longitude at the time. The cluster of stars to the lower right of the thin crescent Moon is the Praesepe or Beehive Cluster in Cancer. Just to the right of that is the planet Saturn.
International Space Sta...
2005-12-08 0:0:0
 
Description ISS011-E-12401 (10 July 2005) --- Gulf of Finland is featured in this image photographed by an Expedition 11 crew member on the international space station. This strongly oblique view shows the Gulf of Finland and Lake Ladoga in the sunglint of late afternoon. The image was taken from the station when the position of the craft lay north of the Caspian Sea, approximately 2,500 kilometers to the southeast on the Russia?Kazakhstan border. The Neva River appears in sunglint, connecting Lake Ladoga to the gulf. Although not visible, St. Petersburg?the home town of Sergei Krikalev, space station commander when this picture was taken?lies on the Neva River delta. In this view taken with a powerful 400 millimeter lens, sunglint even reveals the causeways to Kotlin Island in the gulf?including some of the details of their construction. Oblique views reveal marked layers of gray haze generated by air pollution, a common sight over Western Europe. Pollution also renders the bright glint areas a copper color.
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