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Glossarbegriffe: Spiralgalaxie

Description: Spiralgalaxien sind Galaxien mit Spiralarmen: Das sind Regionen mit höherer Dichte, die sich aufgrund der Rotation einer Galaxie bilden und in denen sich Gas und Staub zusammenballen und neue Sterne entstehen. Die meisten Spiralgalaxien sind Scheibengalaxien, daher werden die Bezeichnungen manchmal synonym verwendet. Die meisten Spiralgalaxien haben einen dichten Zentralbereich (Bulge), und viele (einschließlich der Milchstraße) haben einen zentralen Balken. Spiralgalaxien werden von elliptischen, linsenförmigen, irregulären Galaxien sowie von Zwerggalaxien unterschieden (obwohl es auch Zwergspiralgalaxien gibt).

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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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Two spiral galaxies embracing in their early stages of merger with distortions on the smaller galaxy visible

Spiral Galaxy Merger

Bildunterschriften: This image shows two interacting spiral galaxies located approximately 150 million light-years away. Two spiral galaxies are involved in this dance, creating visible distortions in their spiral arms due to the gravitational pull. What is starting as an embrace in this picture, will end in the merger of those two galaxies into one, most likely elliptical, galaxy.
Bildnachweis: ESO credit link

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