Cosmic ray

Cosmological phase transition

Cosmological principle

Cosmos

Dwarf planet

Eclipse

Exoplanet

Expansion of the universe

Extinction (astronomy)

Gravitational lens

Gravitational wave

Hertzsprung–Russell diagram

Hydrostatic equilibrium

Interstellar medium

Lambda-CDM model

Magnetosphere

Main sequence

Metallicity

Molecular cloud

Nebula

{wiki=Category:Concepts_in_astronomy}

In astronomy, "concepts" refer to the fundamental ideas and principles that help us understand the universe and its various phenomena. Here are some key concepts in astronomy: 1. **Celestial Bodies**: This includes stars, planets, moons, asteroids, comets, galaxies, nebulae, and black holes. Each has distinct characteristics and behaviors. 2. **Orbits**: The motion of celestial bodies as they travel in elliptical paths around larger bodies due to gravitational forces.


Concepts in astronomy

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 Children: Concepts in astronomy