This page describes a video Under the Stars with Steve, by Sheila Wiwchar, Canada
Caption:
Third place in the 2021 IAU OAE Astrophotography Contest, category Aurorae (time-lapses).
This is a strange atmospheric phenomenon known as Steve. This is similar to an aurora as it is caused by charged particles interacting with the Earth's magnetic field. However unlike aurorae, the particles which cause Steve are generated high in the Earth's atmosphere rather than coming from the Sun. Note the banded "picket fence" appearance. This is caused by waves of these particles in the upper atmosphere. The name Steve was chosen by the first group to describe this phenomenon as a familiar name for something unknown.
Sheila Wiwchar/IAU OAE
Credit:
Wiwchar, Sheila; IAU OAE
DOI: 10.5281/zenodo.5279746
Related glossary terms:
Aurora
, Aurora Borealis
Categories:
Naked Eye Astronomy
License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons
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Captions in Different Languages:
Caption: Troisième place au concours d'astrophotographie 2021 de l'UAI OAE, catégorie Aurores (images empilées).
Il s'agit d'un étrange phénomène atmosphérique connu sous le nom de Steve. Ce phénomène est similaire à une aurore puisqu'il est causé par des particules chargées qui interagissent avec le champ magnétique de la Terre. Toutefois, contrairement aux aurores, les particules à l'origine de Steve sont générées à haute altitude dans l'atmosphère terrestre et ne proviennent pas du Soleil. Notez l'aspect en bandes de l'image. Ce phénomène est causé par les ondes de ces particules dans la haute atmosphère. Le nom Steve correspond en fait l’acronyme anglais de Strong Thermal Emission Velocity Enhancement (forte augmentation de la vitesse d'émission thermique).
Sheila Wiwchar/IAU OAE
Credit: Wiwchar, Sheila ; AIU OAE
Related glossary terms: Aurora , Aurora Borealis Caption translation status: Approved by a reviewer
Caption translators: Gilles Remy
Caption reviewers: Mamadou Mahamat Djabbi
Caption: Terzo posto al concorso di astrofotografia IAU OAE 2021, categoria Aurore (time-lapse).
Si tratta di uno strano fenomeno atmosferico noto come Steve. È simile a un'aurora perché è causato da particelle cariche che interagiscono con il campo magnetico terrestre. Tuttavia, a differenza delle aurore, le particelle che causano Steve sono generate in alto nell'atmosfera terrestre anziché provenire dal Sole. Si noti come il fenomeno abbia l'aspetto di uno steccato. Questo è causato dalle onde di queste particelle nell'alta atmosfera. Il nome Steve è stato scelto dal primo gruppo che descrisse questo fenomeno come un nome familiare per qualcosa di sconosciuto.
Sheila Wiwchar/IAU OAE
Credit: Wiwchar, Sheila; IAU OAE
Related glossary terms: Aurora , Aurora Boreale Caption translation status: Approved by a reviewer
Caption translators: Giuliana Giobbi, Valentina La Parola
Caption reviewers: Rodolfo Canestrari
