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Collection:
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NASA Astronomy Picture of the Day Collection
Collection
NASA Astronomy Picture of the Day Collection
Collection
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Title:
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Saturn's Moon Tethys
Title
Saturn's Moon Tethys
Title
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Explanation:
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Tethys [ http://www.c3.lanl.…] is one of the larger and closer moons of Saturn [ http://antwrp.gsfc.…]. It was visited by both Voyager spacecraft - Voyager 1 in November 1980 and by Voyager 2 in August 1981. Tethys [ http://seds.lpl.ari…] is now known to be composed almost completely of water ice. Tethys shows a large impact crater that nearly circles the planet. That the impact that caused this crater did not disrupt the moon is taken as evidence that Tethys was not completely frozen in its past. Tethys has two moons named Telesto [ http://seds.lpl.ari…] and Calypso [ http://seds.lpl.ari…] that orbit just ahead of it and behind it. Tethys was originally discovered in 1684 by Giovanni Cassini.
Explanation
Tethys [ http://www.c3.lanl.…] is one of the larger and closer moons of Saturn [ http://antwrp.gsfc.…]. It was visited by both Voyager spacecraft - Voyager 1 in November 1980 and by Voyager 2 in August 1981. Tethys [ http://seds.lpl.ari…] is now known to be composed almost completely of water ice. Tethys shows a large impact crater that nearly circles the planet. That the impact that caused this crater did not disrupt the moon is taken as evidence that Tethys was not completely frozen in its past. Tethys has two moons named Telesto [ http://seds.lpl.ari…] and Calypso [ http://seds.lpl.ari…] that orbit just ahead of it and behind it. Tethys was originally discovered in 1684 by Giovanni Cassini. Explanation
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Credit and Copyright:
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Credit_and_Copyright
Credit and Copyright
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facet_when:
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1684
facet_when
1684
facet_when
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facet_when:
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November 1980
facet_when
November 1980
facet_when
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facet_when:
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August 1981
facet_when
August 1981
facet_when
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facet_where:
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Arizona
facet_where
Arizona
facet_where
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facet_where:
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Saturn
facet_where
Saturn
facet_where
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facet_where:
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Hamilton
facet_where
Hamilton
facet_where
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facet_where:
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Tethys
facet_where
Tethys
facet_where
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facet_where:
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Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
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facet_where:
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Jet Propulsion Laboratory (JPL)
facet_where
Jet Propulsion Laboratory (JPL)
facet_where
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facet_what:
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Voyager
facet_what
Voyager
facet_what
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facet_what:
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Moon
facet_what
Moon
facet_what
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facet_what:
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Saturn
facet_what
Saturn
facet_what
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facet_what:
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Cassini
facet_what
Cassini
facet_what
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facet_what:
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Crater
facet_what
Crater
facet_what
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facet_what:
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Voyager 2
facet_what
Voyager 2
facet_what
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facet_what:
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Voyager 1
facet_what
Voyager 1
facet_what
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facet_what:
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Tethys
facet_what
Tethys
facet_what
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facet_what:
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moon
facet_what
moon
facet_what
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facet_when_year:
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1980
facet_when_year
1980
facet_when_year
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facet_when_year:
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1981
facet_when_year
1981
facet_when_year
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facet_when_year:
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1684
facet_when_year
1684
facet_when_year
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original url:
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original_url
original url
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UID:
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SPD-APOD-ap951124
UID
SPD-APOD-ap951124
UID
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