File:NASA rocket to display artificial clouds in space (32653767132).jpg
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[edit]DescriptionNASA rocket to display artificial clouds in space (32653767132).jpg |
English: An artificial cloud is shown over the Atlantic Ocean as part of a sounding rocket mission in 2012 from NASA's Wallops Flight Facility in Virginia. :
Nasa description : A NASA sounding rocket to be launched from the Poker Flat Research Range, Alaska, between February 13 and March 3, 2017, will form white artificial clouds during its brief, 10-minute flight. The rocket is one of five being launched January through March, each carrying instruments to explore the aurora and its interactions with Earth’s upper atmosphere and ionosphere. Scientists at NASA's Goddard Space Center in Greenbelt, Maryland, explain that electric fields drive the ionosphere, which, in turn, are predicted to set up enhanced neutral winds within an aurora arc. This experiment seeks to understand the height-dependent processes that create localized neutral jets within the aurora. For this mission, two 56-foot long Black Brant IX rockets will be launched nearly simultaneously. One rocket is expected to fly to an apogee of about 107 miles while the other is targeted for 201 miles apogee. Only the lower altitude rocket will form the white luminescent clouds during its flight. During the flight, a vapor tracer cloud of trimethyl aluminum or TMA will be deployed to allow scientists on the ground to be able to visually track the winds within the aurora. Trimethyl aluminum reacts with oxygen when exposed to the atmosphere. The products of the reaction are aluminum oxide, carbon dioxide, and water vapor, which also occur naturally in the atmosphere. The amount of TMA used in the test is much less than that used in a typical July 4 fireworks display. It will be released at altitudes of 60-100 miles high and poses absolutely no hazard to the community. Read more: go.nasa.gov/2kYaBgV Français : Un nuage artificiel s'est formé au dessus de l'océan Atlantique, créé par une Fusée-sonde, dans le cadre d'une mission d'essai, lancée en 2012 à partir de l'installation de vol Wallops de la NASA, située en Virginie. Une fusée-sonde (NASA) était programmée à partir de la base Poker Flat Research (Alaska) entre le 13 février et le 3 mars 2017, pour créer des nuages artificiels blancs lors d'un bref vol de 10 minutes. C'est l’un des cinq lanceurs utilisés de janvier à mars, chacun portant des instruments prévus pour explorer les aurores boréales et leurs interactions avec la haute atmosphère et la ionosphère. Selon des scientifiques du Goddard Space Center de la NASA à Greenbelt (Maryland) les champs électriques dirigent l'ionosphère, ce qui devrait secondairement créer des vents neutres renforcés au sein d'un arc d'aurore. Cette expérience cherche à comprendre les processus dépendant de la hauteur qui créent des jets neutres localisés dans les aurores. Pour cette mission, deux fusées-sondes Black Brant IX de 20 mètres de long ont été préparées, pour être lancées presque simultanément. L'une devrait atteindre un apogée d'environ 107 milles, tandis que l'autre devrait atteindre 201 miles. Seule la fusée de plus basse altitude doit produire des nuages luminescents blancs lors de son vol. Pendant son vol la fusée émet un nuage de traceur (vapeur de triméthylaluminium ou TMA) qui permet aux scientifiques au sol de suivre visuellement les vents dans les aurores. Le triméthylaluminium réagit avec l'oxygène de l'atmosphère en produisant de l'oxyde d'aluminium (et du dioxyde de carbone et de la vapeur d'eau, qui sont aussi naturellement présents dans l'atmosphère. La quantité de TMA utilisée dans le test est bien inférieure à celle utilisée dans un feu d'artifice typique du 4 juillet. Il sera libéré à une altitude de 60 à 100 milles et est sans danger. D'autres expériences sont ensuite prévues en ajoutant au triméthylaluminium un mélange baryum/strontium ionisant lorsqu'il est exposé au soleil (source : https://www.nasa.gov/feature/goddard/2018/sounding-rocket-mission-will-trace-auroral-winds). |
Date | |
Source | NASA rocket to display artificial clouds in space and Auroral Sounding Rocket to Display Artificial Clouds in Space | NASA |
Author | NASA Goddard Space Flight Center from Greenbelt, MD, USA |
More informations : go.nasa.gov/2kYaBgV
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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/32653767132. It was reviewed on 13 February 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 February 2017
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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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