XML

Galaxy Classification - XML

Galaxy classification is a morphological classification system proposed by Edwin Hubble in 1926, which categorizes galaxies into five main types based on their visual appearance: elliptical, lenticular, spiral, barred spiral, and irregular galaxies. Known as the 'Hubble Tuning Fork,' this classification remains widely used as a foundation in astronomy nearly a century later. It was later extended by Gérard de Vaucouleurs and continues to play an important role in modern galactic research.

astronomy galaxy Hubble classification morphological classification universe

<?xml version="1.0" encoding="UTF-8"?>
<items>
  <item>
    <code>E</code>
    <slug>elliptical</slug>
    <name>Elliptical Galaxy</name>
    <description>Galaxies with shapes ranging from spherical to flattened ellipsoidal forms.</description>
    <position>early-type</position>
    <symbol>E</symbol>
  </item>
  <item>
    <code>S0</code>
    <slug>lenticular</slug>
    <name>Lenticular Galaxy</name>
    <description>Galaxies with intermediate characteristics between elliptical and spiral galaxies.</description>
    <position>early-type</position>
    <symbol>S0</symbol>
  </item>
  <item>
    <code>S</code>
    <slug>spiral</slug>
    <name>Spiral Galaxy</name>
    <description>Galaxies with flat disk structures and spiral arms extending from central bulges.</description>
    <position>late-type</position>
    <symbol>S</symbol>
  </item>
  <item>
    <code>SB</code>
    <slug>barred-spiral</slug>
    <name>Barred Spiral Galaxy</name>
    <description>Galaxies with a bar-shaped structure at the center and spiral arms extending from both ends.</description>
    <position>late-type</position>
    <symbol>SB</symbol>
  </item>
  <item>
    <code>Irr</code>
    <slug>irregular</slug>
    <name>Irregular Galaxy</name>
    <description>Galaxies lacking clear symmetry that do not fit into other categories.</description>
    <position>late-type</position>
    <symbol>Irr</symbol>
  </item>
</items>