File:Rosetta’s detection of molecular oxygen ESA15657910.jpeg
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English: Rosetta has made the first detection of molecular oxygen at a comet. The results presented in this graphic are based on data collected by the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis Double-Focusing Mass Spectrometer (ROSINA-DFMS) between September 2014 and March 2015 when Rosetta was still on the approach to the Sun along its orbit. Top middle: high-resolution measurements allowed molecular oxygen (O2) to be distinguished from other species like sulphur (S) and methanol (CH3OH). The detection of the coma gases is stronger closer to the comet nucleus, as expected. The contribution to the detection from contamination from the spacecraft thruster firings during manoeuvres is very low. Top right: the strong correlation of molecular oxygen abundance with water vapour indicates a shared origin and release mechanism from the nucleus. Bottom middle: the O2/H2O ratio does not vary significantly over the study period. Short-lived strong variations are attributed to the decrease of the O2 ratio for occasionally higher H2O abundances linked to the daily water-ice cycle. The overall consistent level implies that O2 is not produced today by solar wind or UV interaction with surface ices, otherwise it would rapidly decrease due to the comet's increased activity. Instead the O2 must have been incorporated into the comet's ices during its formation in the early Solar System, and is being released with the water vapour today. Full story: First detection of molecular oxygen at a comet The individual graphs are available via the blog. |
| Date | 28 October 2015 (upload date) |
| Source | Rosetta’s detection of molecular oxygen |
| Author | European Space Agency |
| Mission | Rosetta |
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This media was created by the European Space Agency (ESA).
Where expressly so stated, images or videos are covered by the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence, ESA being an Intergovernmental Organisation (IGO), as defined by the CC BY-SA 3.0 IGO licence. The user is allowed under the terms and conditions of the CC BY-SA 3.0 IGO license to Reproduce, Distribute and Publicly Perform the ESA images and videos released under CC BY-SA 3.0 IGO licence and the Adaptations thereof, without further explicit permission being necessary, for as long as the user complies with the conditions and restrictions set forth in the CC BY-SA 3.0 IGO licence, these including that:
See the ESA Creative Commons copyright notice for complete information, and this article for additional details.
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   This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license. Attribution: Spacecraft: ESA/ATG medialab; comet: ESA/Rosetta/NavCam –; Data: A. Bieler et al. (2015), CC BY-SA IGO 3.0
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| current | 20:44, 11 June 2020 | | 5,333 × 3,333 (4.42 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2015/10/rosetta_s_detection_of_molecular_oxygen/15657901-1-eng-GB/Rosetta_s_detection_of_molecular_oxygen.jpg via Commons:Spacemedia |
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