Faili:Impact movie.ogv

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Impact_movie.ogv ‎(Ogg Theora video file, length 43 s, 320 × 240 pixels, 292 kbps, file size: 1.49 MB)

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This is Video (Ogg Theora) This is Video (Ogg Theora)

Maelezo

High-speed digital sequence of a vertical impact by a copper sphere traveling at 4.5 km/sec into porous pumice (density of about 1g/cc).

A side-view of a near-vertical impact at 500 frames per second (or 2 milliseconds between each frame) taken with a high-speed video. This is a 60-degree impact (from horizontal) into a highly porous target of fine particles. Now you can see the funnel-shaped ejecta curtain moving across the surface after the crater forms. The curtain resembles an inclined wall of particles that actually represent the collection of particles ejected at a well-defined position, time, and velocity. Eventually the crater emerges from behind the ejecta curtain as it moves outward and becomes transparent. This sequence illustrates the evolution of a crater that is stopped by the effects of gravity, rather than strength in the target. These ejecta are launched out of the target and only gravity limits how far they can travel beyond the rim on ballistic trajectories. If the target had strength, the curtain would seem to separate from the rim as the crater finishes.

English: High-speed digital sequence of a vertical impact by a copper sphere traveling at 4.5 km/sec into porous pumice (density of about 1g/cc). A side-view of a near-vertical impact at 500 frames per second (or 2 milliseconds between each frame) taken with a high-speed video. This is a 60-degree impact (from horizontal) into a highly porous target of fine particles. Now you can see the funnel-shaped ejecta curtain moving across the surface after the crater forms. The curtain resembles an inclined wall of particles that actually represent the collection of particles ejected at a well-defined position, time, and velocity. Eventually the crater emerges from behind the ejecta curtain as it moves outward and becomes transparent. This sequence illustrates the evolution of a crater that is stopped by the effects of gravity, rather than strength in the target. These ejecta are launched out of the target and only gravity limits how far they can travel beyond the rim on ballistic trajectories. If the target had strength, the curtain would seem to separate from the rim as the crater finishes.
Chanzo http://deepimpact.jpl.nasa.gov/gallery/mpeg4.html
Mwandishi NASA Ames Resarch Center (NASA-ARC) Vertical Gun Range, NASA Ames Research Center; Peter H. Schultz, Brown University
Matoleo mengine See Image:Impact still.jpg for a single still frame, and Image:Impact sequence.jpg for a sequence of still frames from similar experiments.
Media of the day This file was selected as the media of the day for 20 January 2011. It was captioned as follows:
English: High-speed digital sequence of a vertical impact by a copper sphere traveling at 4.5 km/sec into porous pumice (density of about 1g/cc). A side-view of a near-vertical impact at 500 frames per second (or 2 milliseconds between each frame) taken with a high-speed video. This is a 60-degree impact (from horizontal) into a highly porous target of fine particles. Now you can see the funnel-shaped ejecta curtain moving across the surface after the crater forms. The curtain resembles an inclined wall of particles that actually represent the collection of particles ejected at a well-defined position, time, and velocity. Eventually the crater emerges from behind the ejecta curtain as it moves outward and becomes transparent. This sequence illustrates the evolution of a crater that is stopped by the effects of gravity, rather than strength in the target. These ejecta are launched out of the target and only gravity limits how far they can travel beyond the rim on ballistic trajectories. If the target had strength, the curtain would seem to separate from the rim as the crater finishes.
Other languages
English: High-speed digital sequence of a vertical impact by a copper sphere traveling at 4.5 km/sec into porous pumice (density of about 1g/cc). A side-view of a near-vertical impact at 500 frames per second (or 2 milliseconds between each frame) taken with a high-speed video. This is a 60-degree impact (from horizontal) into a highly porous target of fine particles. Now you can see the funnel-shaped ejecta curtain moving across the surface after the crater forms. The curtain resembles an inclined wall of particles that actually represent the collection of particles ejected at a well-defined position, time, and velocity. Eventually the crater emerges from behind the ejecta curtain as it moves outward and becomes transparent. This sequence illustrates the evolution of a crater that is stopped by the effects of gravity, rather than strength in the target. These ejecta are launched out of the target and only gravity limits how far they can travel beyond the rim on ballistic trajectories. If the target had strength, the curtain would seem to separate from the rim as the crater finishes.


Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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sasa hivi20:19, 26 Juni 200643 s, 320 × 240 (1.49 MB)Vesta~commonswikiThis is Video (Ogg Theora) '''This is Video (Ogg Theora)''' {{Information |Description=High-speed digital sequence of a vertical impact by a copper sphere traveling at 4.5 km/sec into porous pumice (density of about 1g/cc).

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