Glossary term: Galaxia de disco
Description: Una galaxia de disco es un tipo de galaxia que presenta una estructura plana formada por estrellas, gas y polvo, todos ellos en movimiento circular coplanar alrededor del centro de la galaxia. En estos discos suelen encontrarse brazos espirales y la actividad de formación estelar asociada a ellos. En la mayoría de los esquemas de clasificación de galaxias, las galaxias de disco se distinguen de las galaxias elípticas, irregulares y enanas.
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See this term in other languages
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
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
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In Other Languages
- Árabe: المجرة القرصية
- Alemán: Scheibengalaxie
- Inglés: Disk Galaxy
- Francés: Galaxie à disque
- Italiano: Galassia a disco
- Japonés: 円盤銀河 (external link)
- Coreano: 원반은하
- Portugués de Brasil: Disco Galaxy
- Chino simplificado: 盘状星系
- Chino tradicional: 盤狀星系
Related Media
Sombrero galaxy
Caption: This prominent galaxy M 104 is often called the Sombrero galaxy due to its resemblance to the Mexican hat. This look is created by the thin disk oriented nearly edge-on, which appears illuminated by the dominant bulge. Both, the disk and bulge contain stars, but the stars in the bulge tend to be older, while the disk also harbors large amounts of dust and gas creating shadows. M 104 is located in the constellation Virgo approximately 50 light-years away. While some of the dots visible in the picture are foreground stars and others background galaxies, the majority are actually globular clusters, dense massive clusters of stars, associated with the Sombrero Galaxy.
Credit: ESO/P. Barthel
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License: CC-BY-4.0 Creative Commons Reconocimiento 4.0 Internacional (CC BY 4.0) icons
A visible light image of the Andromeda Galaxy
Caption: The Andromeda Galaxy viewed in visible light. Like our Milky Way, Andromeda is a barred spiral galaxy. Here we can see its bright core and spiral disk. The glow from the stars in the disk is interrupted by lanes of dust that form part of its spiral structure.
Andromeda is the largest galaxy in the Local Group of galaxies that includes the Milky Way.
To the left of the core and just above the disk we see the dwarf galaxy M32 and to the right and below the disk we see the dwarf galaxy M110. These are both satellite galaxies of the Andromeda Galaxy.
Credit: Torben Hansen
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License: CC-BY-2.0 Creative Commons Atribución 2.0 Genérica icons
La galaxia lenticular NGC 2787
Caption: La galaxia lenticular NGC 2787. Esta galaxia es una galaxia de disco, pero carece de la estructura dominante de grandes brazos espirales que se observa en los discos de las galaxias espirales. Su núcleo es muy brillante en comparación con el núcleo de una galaxia espiral. En el disco de la galaxia se pueden observar anillos delgados de polvo.
Credit: NASA/ESA y The Hubble Heritage Team
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License: CC-BY-4.0 Creative Commons Reconocimiento 4.0 Internacional (CC BY 4.0) icons
Spiral Galaxy UGC 2885
Caption: This image shows UGC 2885, a spiral galaxy located in the constellation Perseus, about 230 million light-years from Earth. Spiral galaxies have rotating disks of stars, gas, and dust, with spiral arms extending outward from the central region. In UGC 2885, these arms are very broad and faint, revealing the galaxy’s large size. This galaxy is tilted at an angle to the observer on Earth, meaning it does not appear as the circular "grand design" spiral it would look like if viewed face-on, nor as the thin line with a central bulge it would appear as if viewed edge-on.
UGC 2885 is remarkable because it is roughly twice the diameter of the Milky Way. It was studied by astronomer Vera Rubin, whose observations of how galaxies rotate — including systems like this one — played a key role in the search for dark matter.
The bright star which appears to the left of the galaxy's center is a foreground object not related to the galaxy.
Credit: NASA, ESA, Benne Holwerda (University of Louisville)
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License: PD Public Domain icons
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