Galaxy

Definition of Galaxy as it relates to Science, Astronomy, Planetary Science

Galaxies are vast systems composed of stars, gas, dust, and dark matter, all bound together by gravity. They can contain millions to billions of stars, along with various celestial objects such as star clusters, nebulae, and supernova remnants. Galaxies come in different shapes and sizes, including spiral, elliptical, and irregular. Studying galaxies provides insights into the universe's structure, evolution, and the distribution of matter. In this hierarchy, "Galaxy" as a subcategory under "Planetary Science" emphasizes understanding how galaxies fit into the broader context of our solar system's place in the cosmos, exploring their formation, and unraveling their role within larger-scale structures like galaxy clusters.

Child Hierarchical Categories

[Black Hole]

[Milky Way]

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