Glossarbegriffe: Transneptunisches Objekt

Also known as TNO

Description: Transneptunische Objekte (TNOs) sind eine Klasse von kleinen Objekten und Zwergplaneten, die die Sonne jenseits der Umlaufbahn des Neptun umkreisen. Sie sind dadurch definiert, dass ihr typischer Abstand von der Sonne (die Halbachse ihrer Umlaufbahn) größer ist als der typische Abstand des Neptun von der Sonne (30,1 Astronomische Einheiten, wobei 1 AE der Entfernung zwischen Sonne und Erde entspricht). Es gibt über 2000 bekannte TNOs. Die meisten transneptunischen Objekte gehören zum Kuipergürtel, aber es gibt auch noch weitere Gruppen von TNOs deren Umlaufbahnen außerhalb des Kuipergürtels verlaufen.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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Image of Pluto in enhanced colour to bring out differences in surface composition. They include craters, ridges and plains.


Bildunterschriften: NASA's New Horizons spacecraft captured this high-resolution enhanced colour view of the dwarf planet Pluto on in July 2015. The image combines blue, red and infrared images taken by the Ralph/Multispectral Visual Imaging Camera (MVIC). Pluto’s surface appears enhanced in this view to a rainbow of pale blues, yellows, oranges, and deep reds. The image resolves details and colours on scales as small as 1.3 kilometers.
Bildnachweis: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute credit link

License: PD Public Domain icons