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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 130
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 130
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Author:
Publisher: DIANE Publishing
ISBN: 1428922334
Category :
Languages : en
Pages : 124
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Author: Alan Ladwig
Publisher:
ISBN: 9781733265706
Category : Technology & Engineering
Languages : en
Pages : 500
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Book Description
For centuries, a journey to space has been a shared dream of millions around the world. We have patiently, and impatiently, anticipated Sunday afternoon drives down celestial freeways. Yet, since 1961 when human space travel began, fewer than 560 professional astronauts, cosmonauts, taikonauts and a-half dozen millionaires have seen Earth from a vantage point in space. Given so few orbiting travelers, what made so many ordinary people think they had the slightest chance to fulfill their dream? Because for decades, visionaries, government officials, space companies, and the media told us our ticket to ride was just a rocket away. All we had to do was "keep the dream alive." With so much optimism, shouldn't we all be there by now? See You In Orbit? Our Dream of Spaceflight will be the first non-fiction book to take a historical, personal, irreverent, and often-humorous look at the promises, expectations, principal personalities, and milestones regarding the goal and dream we have to fly in space.
Author: James F. Dugan
Publisher:
ISBN:
Category : Mars probes
Languages : en
Pages : 72
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Book Description
Author: Roger W. Luidens
Publisher:
ISBN:
Category : Galilean satellites
Languages : en
Pages : 52
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Author: James F. Dugan
Publisher:
ISBN:
Category : Planets
Languages : en
Pages : 54
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Book Description
For one-way transfers between Earth and Venus, charts are obtained that show velocity, time, and angle parameters as functions of the eccentricity and semilatus rectum of the Sun-focused vehicle conic. From these curves, others are obtained that are useful in planning one-way and round-trip missions to Venus. The analysis is characterized by circular coplanar planetary orbits, successive two-body approximations, impulsive velocity changes, and circular parking orbits at 1.1 planet radii. For round trips the mission time considered ranges from 65 to 788 days, while wait time spent in the parking orbit at Venus ranges from 0 to 467 days. Individual velocity increments, one-way travel times, and departure dates are presented for round trips requiring the minimum total velocity increment. For both single-pass and orbiting Venusian probes, the time span available for launch becomes appreciable with only a small increase in velocity-increment capability above the minimum requirement. Velocity-increment increases are much more effective in reducing travel time for single-pass probes than they are for orbiting probes. Round trips composed of a direct route along an ellipse tangent to Earth's orbit and an aphelion route result in the minimum total velocity increment for wait times less than 100 days and mission times ranging from 145 to 612 days. Minimum-total-velocity-increment trips may be taken along perihelion-perihelion routes for wait times ranging from 300 to 467 days. These wait times occur during missions lasting from 640 to 759 days.
Author: Congress of the United States Office of
Publisher:
ISBN: 9780894991776
Category : Science
Languages : en
Pages : 132
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Book Description
This report prepared by the Office of Technology Assessment of the United States Congress examines a wide range of potential improvements to the Space Shuttle, explores the future of space transportation for humans, and presents policy options for congressional consideration.
Author: Yasheng Zhang
Publisher: Springer
ISBN: 9811029482
Category : Technology & Engineering
Languages : en
Pages : 248
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Book Description
This book focuses on the theory and design of special space orbits. Offering a systematic and detailed introduction to the hovering orbit, spiral cruising orbit, multi-target rendezvous orbit, initiative approaching orbit, responsive orbit and earth pole-sitter orbit, it also discusses the concept, theory, design methods and application of special space orbits, particularly the design and control method based on kinematics and astrodynamics. In addition the book presents the latest research and its application in space missions. It is intended for researchers, engineers and postgraduates, especially those working in the fields of orbit design and control, as well as space-mission planning and research.
Author: Gerald Knip
Publisher:
ISBN:
Category : Artificial satellites
Languages : en
Pages : 168
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Book Description
Author: Charles L. Zola
Publisher:
ISBN:
Category : Space flight to Venus
Languages : en
Pages : 112
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Book Description
