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Collection:
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NASA Planetary Photo Journal Collection
Collection
NASA Planetary Photo Journal Collection
Collection
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Title:
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Moment of Impact
Title
Moment of Impact
Title
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Original Caption Released with Image:
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When NASA's Deep Impact probe collided with Tempel 1, a bright, small flash was created, which rapidly expanded above the surface of the comet. This flash lasted for more than a second. Its overall brightness is close to that predicted by several models.
After the initial flash, there was a pause before a bright plume quickly extended above the comet surface. The debris from the impact eventually cast a long shadow across the surface, indicating a narrow plume of ejected material, rather than a wide cone. The Deep Impact probe appears to have struck deep, before gases were heated and explosively released. The impact crater was observed to grow in size over time.
A preliminary interpretation of these data indicate that the upper surface of the comet may be fluffy, or highly porous. The observed sequence of impact events is similar to laboratory experiments using highly porous targets, especially those that are rich in volatile substances. The duration of the hot, luminous gas phase, as well as the continued growth of the crater over time, all point to a model consistent with a large crater.
This image was taken by Deep Impact's medium-resolution camera.
Original_Caption_Rel eased_with_Image
When NASA's Deep Impact probe collided with Tempel 1, a bright, small flash was created, which rapidly expanded above the surface of the comet. This flash lasted for more than a second. Its overall brightness is close to that predicted by several models.
After the initial flash, there was a pause before a bright plume quickly extended above the comet surface. The debris from the impact eventually cast a long shadow across the surface, indicating a narrow plume of ejected material, rather than a wide cone. The Deep Impact probe appears to have struck deep, before gases were heated and explosively released. The impact crater was observed to grow in size over time.
A preliminary interpretation of these data indicate that the upper surface of the comet may be fluffy, or highly porous. The observed sequence of impact events is similar to laboratory experiments using highly porous targets, especially those that are rich in volatile substances. The duration of the hot, luminous gas phase, as well as the continued growth of the crater over time, all point to a model consistent with a large crater.
This image was taken by Deep Impact's medium-resolution camera.
Original Caption Released with Image
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Image Credit:
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NASA/JPL-Caltech/UMD
Image_Credit
NASA/JPL-Caltech/UMD
Image Credit
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Produced By:
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University of Maryland
Produced_By
University of Maryland
Produced By
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Mission:
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Deep Impact
Mission
Deep Impact
Mission
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Spacecraft:
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Deep Impact
Spacecraft
Deep Impact
Spacecraft
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Target Name:
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Tempel 1
Target_Name
Tempel 1
Target Name
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Is a satellite of:
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Sol (our sun)
Is_a_satellite_of
Sol (our sun)
Is a satellite of
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Instrument:
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Impactor Targeting Sensor
Instrument
Impactor Targeting Sensor
Instrument
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Product Size:
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1000 samples x 1016 lines
Product_Size
1000 samples x 1016 lines
Product Size
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facet_what:
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Sun
facet_what
Sun
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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Impactor
facet_what
Impactor
facet_what
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facet_what:
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COMETS
facet_what
COMETS
facet_what
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facet_what:
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Deep Impact
facet_what
Deep Impact
facet_what
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facet_what:
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Impactor Targeting Sensor
facet_what
Impactor Targeting Sensor
facet_what
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facet_where:
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Maryland
facet_where
Maryland
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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Image #:
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PIA02131
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UID:
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SPD-PHOTJ-PIA02131
UID
SPD-PHOTJ-PIA02131
UID
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orignial url:
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orignial_url
orignial url
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