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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
291:" 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
319:, 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.
211:
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
303:. 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.
315:
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
88:
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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.
241:, 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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200:, then went to the United States with other German rocket scientists and technicians under "
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678:"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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615:"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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204:" 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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161:. 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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522:"Book Review: Krafft Ehricke's Extraterrestrial Imperative"
424:"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).
589:"Krafft A. Ehricke: Remembering a Rocket Visionary"
127:(March 24, 1917 – December 11, 1984) was a German
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196:as a propulsion engineer from 1942 to 1945 with
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331:Krafft Ehricke's extraterrestrial imperative
450:"Chapter 12. The Mars Project 1948 to 1956"
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237:in 1954. While at Convair, he designed the
139:liquid oxygen/liquid hydrogen upper stage.
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135:. Ehricke is a co-designer of the first
35:Kraft Ehricke and satellite models, 1957
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278:Contributions to space flight dynamics
131:-propulsion engineer and advocate for
448:A. A. Jackson (October 21–25, 2019).
429:. George Mason University. p. 29
824:Technische Universität Berlin alumni
742:(in German) from the archive of the
479:"Ehricke, Krafft Arnold (1917-1984)"
333:. Burlington Ontario: Apogee Books.
572:Biography for Krafft Arnold Ehricke
13:
854:20th-century American male writers
834:Deaths from leukemia in California
655:"The Extraterrestrial Imperative,"
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251:Project Orion (nuclear propulsion)
14:
870:
859:American male non-fiction writers
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422:Marsha Freeman (March 24, 2017).
400:. Astronautix.com. Archived from
502:. Donning Co. Publishers, 2006.
849:20th-century American essayists
844:German male non-fiction writers
799:People from Huntsville, Alabama
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548:"The Lunar Anthropic Principle"
481:. Daviddarling.info. 2007-02-01
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370:"Krafft Arnold Ehricke Papers"
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769:20th-century German inventors
498:Sprekelmeyer, Linda, editor.
374:National Air and Space Museum
348:
167:Technische Universität Berlin
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89:echnische Universität Berlin
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814:American technology writers
784:German spaceflight pioneers
307:Extraterrestrial Imperative
177:under physicists including
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779:German aerospace engineers
632:10.1007/s40430-020-02489-x
185:, attaining his degree in
819:German technology writers
744:Ă–sterreichische Mediathek
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804:German rocket scientists
735:Astrophysics Data System
329:Freeman, Marsha (2009).
187:Aeronautical Engineering
667:, January–February 1978
680:. Apogeespacebooks.com
526:The Schiller Institute
226:using a ferry system.
118:Ingeborg Maria Mattull
794:Engineers from Berlin
740:Krafft Arnold Ehricke
714:www.daviddarling.info
665:Air University Review
163:Technische Hochschule
125:Krafft Arnold Ehricke
23:Krafft Arnold Ehricke
552:Smithsonian Magazine
233:, and then moved to
77:La Jolla, California
839:Operation Paperclip
311:Ehricke promoted a
270:Ehricke received a
202:Operation Paperclip
171:celestial mechanics
109:Centaur Upper Stage
724:2011-09-28 at the
707:2006-08-23 at the
660:2020-02-24 at the
133:space colonization
653:Ehricke, Krafft,
508:978-1-57864-397-4
340:978-1-894959-91-9
214:Wernher von Braun
183:Werner Heisenberg
165:in Berlin (today
158:Woman in the Moon
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69:December 11, 1984
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726:Wayback Machine
709:Wayback Machine
702:www.hq.nasa.gov
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51:March 24, 1917
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682:. Retrieved
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596:. Retrieved
593:Celestis.com
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402:the original
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317:Solar System
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297:New Horizons
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272:space burial
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198:Walter Thiel
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173:and nuclear
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71:(1984-12-11)
789:NASA people
764:1984 deaths
759:1917 births
299:mission to
239:D-1 Centaur
179:Hans Geiger
753:Categories
719:www.tdf.it
684:2010-08-29
485:2010-08-29
408:2010-08-29
349:References
206:Huntsville
194:PeenemĂĽnde
153:Fritz Lang
95:Occupation
47:1917-03-24
641:220510617
598:March 12,
531:March 13,
463:March 13,
433:March 12,
398:"Ehricke"
379:March 12,
143:Biography
722:Archived
705:Archived
658:Archived
557:June 30,
147:Born in
293:Voyager
235:Convair
175:physics
137:Centaur
59:Germany
639:
506:
337:
262:fusion
149:Berlin
129:rocket
115:Spouse
55:Berlin
637:S2CID
625:(8).
459:: 264
453:(PDF)
427:(PDF)
301:Pluto
243:NEXUS
155:film
600:2023
576:IMDb
559:2024
533:2023
504:ISBN
465:2023
435:2023
381:2023
335:ISBN
224:Mars
181:and
79:, US
66:Died
41:Born
627:doi
574:at
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
