Astronomy Glossary

Explore 128 astronomical terms with clear definitions and real-world examples

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128

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44

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58

⭐⭐ Intermediate

26

⭐⭐⭐ Advanced

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I

Irregular Galaxy

⭐⭐

Galaxies

Irregular galaxies lack organized structure—no spiral arms or elliptical symmetry—appearing chaotic and asymmetric.