Ten Most Important Basic Astronomy Facts 1. The Sun, Moon, stars and planets all appear to slowly rise in the East and set in the West each day because the Earth rotates once around its axis every 24 hours. 2. The phases of the moon are caused by the relative position of the Sun, Earth and Moon.

INTRODUCTION TO BASIC STELLAR ASTRONOMY. The stars are distant suns. So, to understand the stars, you must first understand our own sun. The sun is essentially a very large, very hot ball of gas, mostly hydrogen. It is possible to observe quite a lot about our solar system using basic telescopes or even the naked eye, but there are also many tools that can help you identify what you’re seeing and learn more about what’s out there. The Basics of Astronomy. Astronomy is the study of celestial bodies throughout our universe. Jul 01, 2011 · Unit about Astronomy (in English Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.