A logarithmic scale used to measure the brightness of celestial bodies.

Methods like stellar parallax are used to calculate accurate distances to nearby stars. 2. Our Local Neighborhood (Solar System) Introduction to Astronomy | JHU CTY

is a specialized branch of astronomy that analyzes the universe as a single, cohesive entity. It focuses on its birth, broad structural layout, and eventual fate. 🔭 Part 1: Astronomy – The Observational Science

Introductory astronomy bridges what we can see from Earth with the physical laws governing the cosmos. It is heavily focused on the interaction of light and gravity. 1. The Celestial Sphere and Coordinates

While often paired together, these two fields operate on entirely different scales of focus and methodology:

We map the sky as a giant, imaginary grid rotating around the Earth.