Astronomy

Lessons

Kepler's First Law of Motion

With his first law of planetary motion, Kepler rejected circular orbits and showed that an ellipse could better explain the observed motions of Mars. Generalized to all planets, it states that the orbit of a planet follows an ellipse with the Sun at one focus.

With his first law of planetary motion, Kepler rejected circular orbits and showed that an ellipse could better explain the observed motions of Mars. Generalized to all planets, it states that the orbit of a planet follows an ellipse with the Sun at one focus.

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Universe
This book is an amazing technical introduction to astronomy. It covers stellar evolution, the wide variety of astronomical objects, black holes and more. This is a technical book and does rely on math and physics to give a thorough introduction to astronomy.
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