A comprehensive guide to celestial mechanics and gravitational physics, covering cosmic velocities, Kepler's Laws, and gravitational fields. The material explains fundamental concepts of space physics and orbital mechanics essential for understanding satellite motion and planetary orbits.
• First cosmic velocity (orbital velocity) is the minimum speed needed for circular orbit
• Gravitational potential energy and work in gravitational fields are key concepts explained with mathematical formulas
• Kepler's Laws describe planetary motion, with detailed explanations of all three laws
• Gravitational field strength and superposition principle demonstrate how gravitational forces combine
• Astronomical units and celestial phenomena like eclipses are covered