Author Topic: Rosetta mission  (Read 912 times)

PRITAM DASS

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Rosetta mission
« on: November 13, 2014, 07:56:12 PM »
Rosetta mission: Philae lander may be 'up against a wall'




This image was taken by the ROLIS camera on Philae when it was 40 metres above the surface. It suggests a very loose, dusty surface.
« Last Edit: November 13, 2014, 07:57:21 PM by PD1915 »

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Re: Rosetta mission
« Reply #1 on: November 13, 2014, 07:57:59 PM »
The red cross-hairs mark where Philae first hit the ground before bouncing. This image was taken by the OSIRIS instrument on Rosetta from a distance of 30 kilometres back in September. It is thought that Philae bounced twice before settling on the surface. It may have come to rest at the foot of the cliff surrounding the depression, in the lower right corner of the image.



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Re: Rosetta mission
« Reply #2 on: November 13, 2014, 07:59:47 PM »
In this new image released by Esa, the circled speck is the Philae lander during its descent. The picture was taken by Rosetta’s OSIRIS wide-angle camera at 14:19:22 GMT on Wednesday.




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Re: Rosetta mission
« Reply #3 on: November 13, 2014, 08:00:55 PM »


Evening Standard's splash today.

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Re: Rosetta mission
« Reply #4 on: November 13, 2014, 08:02:07 PM »
Stephan Ulamec explains that activating any moving parts will be high risk, tipping the lander or pushing it away from the surface completely: “Drilling without being anchored is dangerous.” The same applies to any attempt to fire the harpoons.

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Re: Rosetta mission
« Reply #5 on: November 13, 2014, 08:02:48 PM »
The landing gear was designed to “hop” to relocate the craft, but without knowing whether the feet are in contact with the surface this is not currently a viable option to move it to a more suitable position - away from the cliff face.

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Re: Rosetta mission
« Reply #6 on: November 13, 2014, 08:03:43 PM »
But there’s clearly a variety of surfaces on the comet, rocky and dusty, which may explain the bounces.


Chances are the comet is made of a very low-density material, without a hard crust.


Early images of the ground were overexposed, making it impossible to spot the lander, but subsequent images waiting to be downloaded from Rosetta will be more accurately exposed.

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Re: Rosetta mission
« Reply #7 on: November 13, 2014, 08:04:25 PM »
Timelapse of pictures from Rosetta reveals Philae rotating as it came down. One of the images is so clear you can see the lander’s solar panels.



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Re: Rosetta mission
« Reply #8 on: November 13, 2014, 08:06:31 PM »

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Re: Rosetta mission
« Reply #9 on: November 13, 2014, 08:08:10 PM »



A picture acquired by the ROLIS (ROsetta Lander Imaging System) instrument on the Philae lander, showing the comet 67P/Churyumov-Gerasimenko during Philae’s descent from a distance of approximately 3 km from the surface.

 

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