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Old 10-26-2017, 09:16 AM   #466
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26 October 2017
Last year, a fountain of dust was spotted streaming from Rosetta’s comet, prompting the question: how was it powered? Scientists now suggest the outburst was driven from inside the comet, perhaps released from ancient gas vents or pockets of hidden ice.
http://www.esa.int/Our_Activities/Sp...red_from_below
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Old 10-01-2018, 09:46 AM   #467
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This image shows a portion of 67P/C-G as viewed by Rosetta on 22 September 2014, only one and a half months after the spacecraft had made its rendezvous with the comet. At the time, the spacecraft was 28.2 km from the comet centre (around 26.2 km from the surface). Amateur astronomer Jacint Roger Perez, from Spain, selected and processed this view by combining three images taken in different wavelengths by the OSIRIS narrow-angle camera on Rosetta.
http://www.esa.int/spaceinimages/Ima...omet_landscape
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Old 12-12-2018, 12:04 PM   #468
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12 December 2018
A new study reveals that, contrary to first impressions, Rosetta did detect signs of an infant bow shock at the comet it explored for two years – the first ever seen forming anywhere in the Solar System.
From 2014 to 2016, ESA’s Rosetta spacecraft studied Comet 67P/Churyumov-Gerasimenko and its surroundings from near and far. It flew directly through the ‘bow shock’ several times both before and after the comet reached its closest point to the Sun along its orbit, providing a unique opportunity to gather in situ measurements of this intriguing patch of space.
http://www.esa.int/Our_Activities/Sp...k_around_comet
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Old 12-14-2018, 01:12 PM   #469
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14 December 2018
A special visitor is crossing the sky: Comet 46P/Wirtanen, sighted with telescopes and binoculars in recent weeks, is on the way to its closest approach to Earth this weekend, when it might become visible to the naked eye.
A bright comet with a period of 5.5 years, 46P had been chosen in the 1990s as the target of ESA’s Rosetta mission.
http://www.esa.int/Our_Activities/Sp...setta_memories

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Old 12-17-2018, 10:40 AM   #470
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More on 46P.

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Title A visit from an old friend
Released 17/12/2018 10:00 am
Copyright ESA / ESAC Astronomy Club / W. Van Reeven
Description
An old friend of ESA, Comet 46P/Wirtanen, is crossing our skies this month.
The comet nucleus is at the core of the brightest spot at the centre of the image, and the green diffuse cloud is its coma. The green colour is caused by molecules – mainly CN (cyanogen) and C2 (diatomic carbon) – that are ionised by sunlight as the comet approaches the Sun. A hint of the comet’s tail is visible to the upper left; the diagonal stripes are star trails.

http://www.esa.int/spaceinimages/Ima..._an_old_friend

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Old 01-17-2019, 11:37 AM   #471
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Some more on 46/P

http://www.esa.int/spaceinimages/Ima..._that_got_away
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Old 02-18-2019, 04:30 PM   #473
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18 February 2019
Feeling stressed? You’re not alone. ESA’s Rosetta mission has revealed that geological stress arising from the shape of Comet 67P/Churyumov–Gerasimenko has been a key process in sculpting the comet's surface and interior following its formation.
http://www.esa.int/Our_Activities/Sp...pted_by_stress
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Old 02-18-2019, 04:39 PM   #474
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18 February 2019
Feeling stressed? You’re not alone. ESA’s Rosetta mission has revealed that geological stress arising from the shape of Comet 67P/Churyumov–Gerasimenko has been a key process in sculpting the comet's surface and interior following its formation.
http://www.esa.int/Our_Activities/Sp...pted_by_stress

Could some kind moderator delete this dounle post please?

Thanks, N.

Last edited by Notebook; 02-18-2019 at 04:54 PM.
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Old 04-23-2019, 09:17 AM   #475
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itle Comet cat
Released 23/04/2019 8:00 am
Copyright ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA (CC BY-SA 4.0)
Description
From a distance of five million kilometres to within 20 metres, ESA’s Rosetta spacecraft captured images of Comet 67P/Churyumov-Gerasimenko from all angles.
Between the first and the last images lies one of humanity’s greatest space adventures to rendezvous with and follow a comet as it orbited the Sun, and deploy a lander to its surface.
Seen from afar, the comet is usually likened to a duck in shape, but in this enchanting close-up view its profile resembles that of a cat’s face seen side-on.
http://www.esa.int/spaceinimages/Ima...9/04/Comet_cat
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