by dromeuf » Thu Oct 17, 2024 9:09 am
22 minutes around the nucleus of a comet
As comet C/2023 A3 (Tsuchinshan-ATLAS) passes by, I'd like to take this opportunity to present my latest stereoscopic 3D film on the nucleus of a comet (release oct 24). This film gives you a detailed look at the product of predominantly solar erosion on the surface of a comet, as if you were in a spacecraft circling, approaching and landing on the comet.
The 3D reconstruction of small bodies is fundamental to the study of their physical properties, starting with their volume, which gives access to their density and thus to the formation processes. The study of their surfaces (and those of planets) and evolutionary processes requires quantitative data (height of cliffs, depth of basins, craters, wells, etc.). This is particularly the case for thermal modeling (energy received and integrated by the body) to determine lighting conditions. From an operational point of view, placing a vehicle on these surfaces (site selection) or operating a rover requires 3D reconstruction and stereo vision. To understand the overall shape of small bodies, we need to: understand accretion and evolution processes, know the gravity field (navigation aid). Geomorphological studies of terrestrial planets, asteroids and cometary nuclei require: a better understanding of the geological processes involved, information on internal structure, localized morphological studies at high spatial resolution, understanding of global and local topography, particularly slopes.
This work led to the publication of an article in the scientific journal
Monthly Notices of the Royal Astronomical Society (MNRAS), Volume 531, Issue 2, June 2024, Pages 2494-2516,
https://doi.org/10.1093/mnras/stae1290 “
Detection and characterization of icy cavities on the nucleus of comet 67P/Churyumov-Gerasimenko” by Philippe Lamy, Guillaume Faury, David Romeuf, Olivier Groussin.
This study represents the first confirmation and characterization of SAPs (Subsurface Access Points) on a comet, i.e. cavities 20 to 47 m deep, with evidence of the presence of water ice. These cavities are areas of interest for a potential space probe that could gain direct access to the subsurface materials. We have also correlated the departure of a transient jet, linked to insolation at the bottom of one of these icy cavities, thanks to images and a 3D model associated with a thermal model.
If you want to learn more about the evolution of the comet's surface morphology, you can read this scientific article: “
Surface Morphology of Comets and Associated Evolutionary Processes: A Review of Rosetta's Observations of 67P/Churyumov-Gerasimenko”.
https://doi.org/10.1007/s11214-019-0602-1
Watch it directly with the YouTube application on your 4K TV, in the evening in the dark and with the sound turned up to a powerful bass to fully appreciate Scott Buckley's music.
3D anaglyph red-cyan 4K version ***** the visual effect is very impressive :
https://youtu.be/ztZ2d3laOQA
Click to play embedded YouTube video.
2D 4K version :
https://youtu.be/RJYOGgD4bo4
Click to play embedded YouTube video.
[b]22 minutes around the nucleus of a comet[/b]
As comet C/2023 A3 (Tsuchinshan-ATLAS) passes by, I'd like to take this opportunity to present my latest stereoscopic 3D film on the nucleus of a comet (release oct 24). This film gives you a detailed look at the product of predominantly solar erosion on the surface of a comet, as if you were in a spacecraft circling, approaching and landing on the comet.
The 3D reconstruction of small bodies is fundamental to the study of their physical properties, starting with their volume, which gives access to their density and thus to the formation processes. The study of their surfaces (and those of planets) and evolutionary processes requires quantitative data (height of cliffs, depth of basins, craters, wells, etc.). This is particularly the case for thermal modeling (energy received and integrated by the body) to determine lighting conditions. From an operational point of view, placing a vehicle on these surfaces (site selection) or operating a rover requires 3D reconstruction and stereo vision. To understand the overall shape of small bodies, we need to: understand accretion and evolution processes, know the gravity field (navigation aid). Geomorphological studies of terrestrial planets, asteroids and cometary nuclei require: a better understanding of the geological processes involved, information on internal structure, localized morphological studies at high spatial resolution, understanding of global and local topography, particularly slopes.
This work led to the publication of an article in the scientific journal [i]Monthly Notices of the Royal Astronomical Society[/i] (MNRAS), Volume 531, Issue 2, June 2024, Pages 2494-2516, [url]https://doi.org/10.1093/mnras/stae1290[/url] “[i]Detection and characterization of icy cavities on the nucleus of comet 67P/Churyumov-Gerasimenko[/i]” by Philippe Lamy, Guillaume Faury, David Romeuf, Olivier Groussin.
This study represents the first confirmation and characterization of SAPs (Subsurface Access Points) on a comet, i.e. cavities 20 to 47 m deep, with evidence of the presence of water ice. These cavities are areas of interest for a potential space probe that could gain direct access to the subsurface materials. We have also correlated the departure of a transient jet, linked to insolation at the bottom of one of these icy cavities, thanks to images and a 3D model associated with a thermal model.
If you want to learn more about the evolution of the comet's surface morphology, you can read this scientific article: “[i]Surface Morphology of Comets and Associated Evolutionary Processes: A Review of Rosetta's Observations of 67P/Churyumov-Gerasimenko[/i]”.
[url]https://doi.org/10.1007/s11214-019-0602-1[/url]
Watch it directly with the YouTube application on your 4K TV, in the evening in the dark and with the sound turned up to a powerful bass to fully appreciate Scott Buckley's music.
3D anaglyph red-cyan 4K version ***** the visual effect is very impressive : [url]https://youtu.be/ztZ2d3laOQA[/url]
[youtube]https://www.youtube.com/watch?v=ztZ2d3laOQA[/youtube]
2D 4K version : [url]https://youtu.be/RJYOGgD4bo4[/url]
[youtube]https://www.youtube.com/watch?v=RJYOGgD4bo4[/youtube]