Because the stars are the fundamental building blocks of the universe, decoding the message of starlight has been a central challenge and triumph of modern astronomy.

Introduction to Astronomy provides a quantitative introduction to the physics of the solar system, stars, the interstellar medium, the galaxy, and the universe, as determined from a variety of astronomical …

May 6, 2025 · Learn the basics of astronomy and how it helps scientists understand everything from planets and moons to galaxies and the structure of the universe.

Here are a few tips to get you started with astronomy for beginners, and some ways to deepen your connection to the cosmos. Some locations are better than others for stargazing, but you can still do it …

This introductory astronomy textbook offers a comprehensive journey through the universe, beginning with foundational concepts and expanding outward to the farthest reaches of space and time.

Discover the majesty and marvels of the stars, planets and other celestial objects in this free online astronomy course. Since ancient times, people have looked at the night sky and wondered what lies …

You'll explore the basics of our universe, from planets and stars to galaxies and beyond. The course covers celestial mechanics, planetary systems, stellar evolution, and cosmology. You'll learn about …