|
Collection:
|
|
NASA Great Images in Nasa Collection
Collection
NASA Great Images in Nasa Collection
Collection
|
|
Title:
|
|
Voyager 1 View of Callisto
Title
Voyager 1 View of Callisto
Title
|
|
Full Description:
|
|
Voyager 1 took this picture of Callisto during Voyager's approach to Jupiter's outer large satellite in 1979. Both Galileo and Marius discovered Callisto in 1610. In Greek mythology, Callisto was a nymph loved by Zeus and thus hated by Hera. Hera turned her into a bear, which Zeus placed in the heavens as the constellation Ursa Major. Voyager was 350,000 kilometers from Callisto and took this picture that shows features about seven kilometers wide across the surface. Callisto is a little smaller than Ganymede (Callisto is about the size of Mercury) and it seems that it is composed of a mixture of ice and rock (about 40 percent ice and 60 percent rock and iron). The darker color of Callisto (about half as reflective as Ganymede but still twice as bright as the Moon) implies that the upper surface is "dirty ice" or water- rich rock frozen on Callisto's cold surface (approximately -243 Fahrenheit degrees at the equator). Callisto's atmosphere is mostly carbon dioxide. Far more craters appear on the surface of Callisto than on the surface of Ganymede, leading scientists to believe that Callisto is the oldest of the Galilean satellites. Callisto could date back as far as four billion years ago and has remained relatively unchanged in the history of space.
Full_Description
Voyager 1 took this picture of Callisto during Voyager's approach to Jupiter's outer large satellite in 1979. Both Galileo and Marius discovered Callisto in 1610. In Greek mythology, Callisto was a nymph loved by Zeus and thus hated by Hera. Hera turned her into a bear, which Zeus placed in the heavens as the constellation Ursa Major. Voyager was 350,000 kilometers from Callisto and took this picture that shows features about seven kilometers wide across the surface. Callisto is a little smaller than Ganymede (Callisto is about the size of Mercury) and it seems that it is composed of a mixture of ice and rock (about 40 percent ice and 60 percent rock and iron). The darker color of Callisto (about half as reflective as Ganymede but still twice as bright as the Moon) implies that the upper surface is "dirty ice" or water- rich rock frozen on Callisto's cold surface (approximately -243 Fahrenheit degrees at the equator). Callisto's atmosphere is mostly carbon dioxide. Far more craters appear on the surface of Callisto than on the surface of Ganymede, leading scientists to believe that Callisto is the oldest of the Galilean satellites. Callisto could date back as far as four billion years ago and has remained relatively unchanged in the history of space.
Full Description
|
|
Date:
|
|
03/06/1979
|
|
NASA Center:
|
|
Jet Propulsion Laboratory
NASA_Center
Jet Propulsion Laboratory
NASA Center
|
|
Subject Category:
|
|
Voyager-Galileo
Subject_Category
Voyager-Galileo
Subject Category
|
|
Subject Category:
|
|
Jupiters Moons
Subject_Category
Jupiters Moons
Subject Category
|
|
Keywords:
|
|
JPL
|
|
Keywords:
|
|
Tour
|
|
Keywords:
|
|
Jupiter
Keywords
Jupiter
Keywords
|
|
Keywords:
|
|
Voyager
Keywords
Voyager
Keywords
|
|
Keywords:
|
|
Major
|
|
Keywords:
|
|
Grand
|
|
Keywords:
|
|
Callisto
Keywords
Callisto
Keywords
|
|
Keywords:
|
|
Ursa
|
|
Audience:
|
|
General Public
Audience
General Public
Audience
|
|
facet_what:
|
|
Moon
facet_what
Moon
facet_what
|
|
facet_what:
|
|
Mercury
facet_what
Mercury
facet_what
|
|
facet_what:
|
|
Galileo
facet_what
Galileo
facet_what
|
|
facet_what:
|
|
Jupiter
facet_what
Jupiter
facet_what
|
|
facet_what:
|
|
Voyager
facet_what
Voyager
facet_what
|
|
facet_what:
|
|
Voyager 1
facet_what
Voyager 1
facet_what
|
|
facet_what:
|
|
Ganymede
facet_what
Ganymede
facet_what
|
|
facet_what:
|
|
Callisto
facet_what
Callisto
facet_what
|
|
facet_what:
|
|
Ursa Major
facet_what
Ursa Major
facet_what
|
|
facet_where:
|
|
Mercury
facet_where
Mercury
facet_where
|
|
facet_where:
|
|
Jet Propulsion Laboratory
facet_where
Jet Propulsion Laboratory
facet_where
|
|
facet_where:
|
|
Jupiter
facet_where
Jupiter
facet_where
|
|
facet_where:
|
|
Ganymede
facet_where
Ganymede
facet_where
|
|
facet_where:
|
|
Callisto
facet_where
Callisto
facet_where
|
|
facet_where:
|
|
Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
|
|
facet_when:
|
|
1979
facet_when
1979
facet_when
|
|
facet_when:
|
|
1610
facet_when
1610
facet_when
|
|
facet_when:
|
|
03-06-1979
facet_when
03-06-1979
facet_when
|
|
facet_when_year:
|
|
1979
facet_when_year
1979
facet_when_year
|
|
facet_when_year:
|
|
1610
facet_when_year
1610
facet_when_year
|
|
Image #:
|
|
PIA-02253
Image_#
PIA-02253
Image #
|
|
original_url:
|
original_url
original_url
|
|
UID:
|
|
SPD-GRIN-GPN-2003-00 0004
UID
SPD-GRIN-GPN-2003-00 0004
UID
|
|
Center:
|
|
JPL
|
|
Center Number:
|
|
PIA-02253
Center_Number
PIA-02253
Center Number
|
|
GRIN DataBase Number:
|
|
GPN-2003-000004
GRIN_DataBase_Number
GPN-2003-000004
GRIN DataBase Number
|
|
Creator-Photographer:
|
|
NASA
Creator-Photographer
NASA
Creator-Photographer
|
|
Original Source:
|
|
Digital
Original_Source
Digital
Original Source
|
