Glossary term: Disk Galaxy
Description: A disk galaxy is a type of galaxy that features a flat component of stars, gas, and dust, all of which are in circular coplanar motion around the galaxy's center. Spiral arms and associated star-forming activity are often present in these disks. In most galaxy classification schemes, disk galaxies are differentiated from elliptical, irregular, and dwarf galaxies.Related Terms:
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Term and definition status: This term and its definition is still awaiting approval
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Sombrero galaxyCaption: 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 credit link
License: CC-BY-4.0 Creative Comments Attribution 4.0 International (CC BY 4.0) icons