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Extraterrestrials-where are they?

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Pergamon Press, 1982 - Science - 182 pages

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Contents

RobertSheaffer AN EXAMINATION OF CLAIMS THAT
20
PREEMPTION OF THE GALAXY
34
TERRAFORMING
62
Copyright

10 other sections not shown

Other editions - View all

Extraterrestrials: Where Are They?
Extraterrestrials: Where Are They?
Ben Zuckerman
Limited preview - 1995
Extraterrestrials: Where Are They?
Extraterrestrials: Where Are They?
Ben Zuckerman,Michael H. Hart
No preview available - 1995

Common terms and phrases

advanced civilizations amino acids angular momentum assume asteroid belt asteroids Astronomy atmosphere binary biological bits Bracewell calculations carbon chemical evolution chemistry colonization communication cosmic cosmological Darwinian deceleration density detect disc stars discussed distance Drake equation Dyson Earth editor emigration energy estimate existence experiments explanation extraterrestrial factor formation frequency galactic Galaxy genes genetic Gerald Feinberg habitable planets habitable zone habitats Hart Hoerner human hydrogen hypothesis Icarus infrared intelligent Interplanetary Soc interstellar settlement interstellar travel Jill Tarter large number less main sequence mass driver mega-civilization meteorites molecules nuclear nucleic acid nucleotides number of habitable observed orbit organic origin Papagiannis parsecs pellets peptides percent physical planetary systems Ponnamperuma population possible present probably problem propulsion protein radiation radio random result Sagan signals solar system space colonies space habitats stellar suggested technological telescopes temperature terrestrial tions universe velocity wavelength Zuckerman

Bibliographic information

QR code for Extraterrestrials-where are they?
TitleExtraterrestrials-where are they?
Pergamon international library of science, technology, engineering, and social studies
AuthorsMichael H. Hart, Ben Zuckerman
EditorsMichael H. Hart, Ben Zuckerman
ContributorsMichael H. Hart, Ben Zuckerman
Editionillustrated
PublisherPergamon Press, 1982
ISBN0080263429, 9780080263427
Length182 pages
Subjects ›  › 

Science / Astronomy
Science / General
Science / Life Sciences / Biology
Science / Space Science
  
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