 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.