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and its applications. His two-volume work entitled Space Flight is probably the most complete and surely the most useful introduction to this complex subject ever written. It focuses on methods for exploration of the solar system. Although he was not the first, he clearly demonstrated the so-called
302:" method for utilizing hyperbolic encounters with an intermediate planet to increase (or decrease) the velocity and orbital elements of a space vehicle. This technique opened the entire solar system to robotic exploration by using what he called "Instrumented Comets." Examples include the
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Ehricke undertook a major, multi-decade study of the industrial development of the Moon, which he described as Earth's "seventh continent." His lunar industrialization concept was based on the most advanced technologies, such as nuclear-powered freight transporters, and using
330:, in order to sustain the development of the species. There are no external "limits to growth," Ehricke insisted, because while the Earth is a "closed system," the exploration of space opens the universe to humanity. For Ehricke, human creativity has no limits.
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In 1948, while working for the U.S. Army, Ehricke wrote a story about a crewed mission to Mars called "Expedition Ares". It anticipated the many challenges that still face explorers who will make the journey in the future. In the same year he wrote a book with
314:. His contribution to this important field of exploration has been neglected for many decades and incorrect claims of the "invention" of what is now called gravity assist were made by Minovitch.
326:
concept called the "Extraterrestrial
Imperative." This idea refers to Ehricke's belief that it was the responsibility of humanity to explore space and exploit the resources of the
267:
In 1966, Ehricke was inducted into the
International Aerospace Hall of Fame for his engineering achievements and his influential ideas on the purpose of space exploration.
252:, the world's first upper-stage-booster that used liquid hydrogen and oxygen. He also created an early space station design, based on launch by Convair's Atlas rocket. The
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energy to power his city, Selenopolis, on the Moon. Ehricke famously stated in 1984, "If God wanted man to become a spacefaring species, He would have given man a Moon."
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on April 21, 1997, when a rocket sent a small amount of his cremated remains into Earth orbit.
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689:"Krafft Ehricke Extraterrestrial Imperative by Marsha Freeman An Apogee Books Publication"
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Negri, Rodolfo
Batista; Prado, AntĂ´nio Fernando Bertachini de Alme (14 July 2020).
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626:"A historical review of the theory of gravity-assists in the pre-spaceflight era"
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led by
Ehricke. Also, during his stay at General Dynamics, he participated in
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German-American rocket scientist and engineer and space colonization advocate
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215:" in 1947. He worked for a short time with the Von Braun Rocket Team at
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Journal of the
Brazilian Society of Mechanical Sciences and Engineering
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172:. At the age of 12, he formed his own rocket society. He attended the
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Fifty-Third
Symposium of the International Academy of Astronautics
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533:"Book Review: Krafft Ehricke's Extraterrestrial Imperative"
435:"KRAFFT EHRICKE. The Moral Imperative of Space Exploration"
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reusable rocket was a 1960s concept designed by a group at
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Upon leaving government service in 1952, Ehricke worked at
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Ehricke was an accomplished practitioner in the field of
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missions to the outer planets and the recent successful
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He married
Ingeborg Ehricke (born 12 September 1922).
600:"Krafft A. Ehricke: Remembering a Rocket Visionary"
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138:(March 24, 1917 – December 11, 1984) was a German
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342:Krafft Ehricke's extraterrestrial imperative
461:"Chapter 12. The Mars Project 1948 to 1956"
248:in 1954. While at Convair, he designed the
150:liquid oxygen/liquid hydrogen upper stage.
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233:, which detailed how man could travel to
146:. Ehricke is a co-designer of the first
46:Kraft Ehricke and satellite models, 1957
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289:Contributions to space flight dynamics
142:-propulsion engineer and advocate for
459:A. A. Jackson (October 21–25, 2019).
440:. George Mason University. p. 29
7:
835:Technische Universität Berlin alumni
753:(in German) from the archive of the
490:"Ehricke, Krafft Arnold (1917-1984)"
344:. Burlington Ontario: Apogee Books.
583:Biography for Krafft Arnold Ehricke
865:20th-century American male writers
845:Deaths from leukemia in California
666:"The Extraterrestrial Imperative,"
262:Project Orion (nuclear propulsion)
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870:American male non-fiction writers
433:Marsha Freeman (March 24, 2017).
411:. Astronautix.com. Archived from
513:. Donning Co. Publishers, 2006.
860:20th-century American essayists
855:German male non-fiction writers
810:People from Huntsville, Alabama
559:"The Lunar Anthropic Principle"
492:. Daviddarling.info. 2007-02-01
381:"Krafft Arnold Ehricke Papers"
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780:20th-century German inventors
509:Sprekelmeyer, Linda, editor.
385:National Air and Space Museum
178:Technische Universität Berlin
100:echnische Universität Berlin
825:American technology writers
795:German spaceflight pioneers
318:Extraterrestrial Imperative
188:under physicists including
886:
790:German aerospace engineers
643:10.1007/s40430-020-02489-x
196:, attaining his degree in
830:German technology writers
755:Ă–sterreichische Mediathek
39:
815:German rocket scientists
746:Astrophysics Data System
340:Freeman, Marsha (2009).
198:Aeronautical Engineering
678:, January–February 1978
691:. Apogeespacebooks.com
537:The Schiller Institute
237:using a ferry system.
129:Ingeborg Maria Mattull
805:Engineers from Berlin
751:Krafft Arnold Ehricke
725:www.daviddarling.info
676:Air University Review
174:Technische Hochschule
136:Krafft Arnold Ehricke
34:Krafft Arnold Ehricke
563:Smithsonian Magazine
244:, and then moved to
88:La Jolla, California
850:Operation Paperclip
322:Ehricke promoted a
281:Ehricke received a
213:Operation Paperclip
182:celestial mechanics
120:Centaur Upper Stage
735:2011-09-28 at the
718:2006-08-23 at the
671:2020-02-24 at the
144:space colonization
664:Ehricke, Krafft,
519:978-1-57864-397-4
351:978-1-894959-91-9
225:Wernher von Braun
194:Werner Heisenberg
176:in Berlin (today
169:Woman in the Moon
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80:December 11, 1984
16:(Redirected from
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693:. Retrieved
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607:. Retrieved
604:Celestis.com
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413:the original
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328:Solar System
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308:New Horizons
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283:space burial
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209:Walter Thiel
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184:and nuclear
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82:(1984-12-11)
800:NASA people
775:1984 deaths
770:1917 births
310:mission to
250:D-1 Centaur
190:Hans Geiger
764:Categories
730:www.tdf.it
695:2010-08-29
496:2010-08-29
419:2010-08-29
360:References
217:Huntsville
205:PeenemĂĽnde
164:Fritz Lang
106:Occupation
58:1917-03-24
652:220510617
609:March 12,
542:March 13,
474:March 13,
444:March 12,
409:"Ehricke"
390:March 12,
154:Biography
733:Archived
716:Archived
669:Archived
568:June 30,
158:Born in
304:Voyager
246:Convair
186:physics
148:Centaur
70:Germany
650:
517:
348:
273:fusion
160:Berlin
140:rocket
126:Spouse
66:Berlin
648:S2CID
636:(8).
470:: 264
464:(PDF)
438:(PDF)
312:Pluto
254:NEXUS
166:film
611:2023
587:IMDb
570:2024
544:2023
515:ISBN
476:2023
446:2023
392:2023
346:ISBN
235:Mars
192:and
90:, US
77:Died
52:Born
638:doi
585:at
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