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Astronautics: The Physics of Space Flight by Ulrich Walter Book Details
| Book Name | Astronautics: The Physics of Space Flight |
| Author | Ulrich Walter |
| Category | Aeronautical Engineering Books, Education Books |
| Book Language | English |
| Pages | 851 |
| ISBN | 9783319743721 |
| Country | India |
| Book Size | 22 MB |
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About Astronautics: The Physics of Space Flight by Ulrich Walter Book
Astronautics, also known as spaceflight or cosmonautics, is the branch of science and engineering that deals with the design, development, and operation of vehicles and systems for travel and exploration beyond Earth's atmosphere. The physics of space flight involves understanding the principles that govern the motion, behavior, and challenges faced by objects and spacecraft in the space environment. Here are some key aspects of the physics of space flight:
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Orbital Mechanics: One of the fundamental concepts in astronautics is orbital mechanics, which deals with the motion of objects in orbit around celestial bodies. Understanding the balance between gravitational attraction and the centrifugal force generated by an object's velocity is essential for achieving stable orbits.
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Escape Velocity: Escape velocity is the minimum velocity required for an object to break free from a planet or celestial body's gravitational influence. It's a crucial consideration when launching spacecraft from a planet's surface.
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Thrust and Propulsion: Spacecraft propulsion systems are necessary to overcome Earth's gravity and achieve the required velocities for space travel. The principle of action and reaction, as described by Newton's third law of motion, is the basis for rocket propulsion. Thrust is generated by expelling mass (propellant) at high velocities in the opposite direction, according to the law of conservation of momentum.
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Microgravity and Freefall: Objects in orbit experience a state of apparent weightlessness due to the continuous state of freefall around Earth. This microgravity environment has unique effects on human physiology and the behavior of fluids and materials.
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Newton's Laws in Space: Newton's laws of motion play a central role in understanding spacecraft dynamics. The first law (inertia) explains how objects in space continue in their state of motion unless acted upon by external forces. The second law (force equals mass times acceleration) describes the relationship between forces applied to spacecraft and their resulting accelerations. The third law (action and reaction) is the foundation for rocket propulsion.
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Trajectory Planning and Maneuvers: Spacecraft trajectories are carefully planned to achieve specific mission objectives. Changing a spacecraft's trajectory requires careful calculation of the necessary velocity changes and timing of maneuvers.
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Radiation and Space Environment: The space environment exposes spacecraft and astronauts to various forms of radiation, including solar radiation and cosmic rays. Understanding these forms of radiation and their effects is essential for designing spacecraft and protecting human occupants.
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Reentry and Atmospheric Drag: When a spacecraft returns to Earth, it experiences atmospheric drag, which slows it down and causes it to heat up due to compression of the air ahead. Managing the reentry process is crucial to ensure a safe return.
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Energy Considerations: Spacecraft must carry their own energy sources for various systems, including propulsion, communication, and life support. Solar panels, nuclear reactors, and other energy systems are used to power spacecraft systems.
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Docking and Rendezvous: Procedures for spacecraft docking and rendezvous require precise calculations of relative velocities, trajectories, and timing to ensure a successful connection between two spacecraft.
Understanding the physics of space flight is essential for designing missions, developing spacecraft, and ensuring the safety and success of space exploration endeavors. It involves applying the principles of classical mechanics, celestial dynamics, and other relevant fields of physics to the unique challenges posed by the space environment.
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