Cosmic Collisions and the Longevity of Non-Spacefaring Galactic Civilizations

Ostro, S. H.; Sagan, C.

dc.contributor.author	Ostro, S. H.	en_US
dc.contributor.author	Sagan, C.	en_US
dc.date.accessioned	2004-09-24T21:02:25Z
dc.date.available	2004-09-24T21:02:25Z
dc.date.issued	1998-05	en_US
dc.identifier.citation	Astrodynamics and Geophysics	en_US
dc.identifier.citation	USA	en_US
dc.identifier.clearanceno	98-0908	en_US
dc.identifier.uri	http://hdl.handle.net/2014/19498
dc.description.abstract	Interplanetary collision hazards in many planetary systems force civilizations to become spacefaring or extinct. This selection pressure apparently acts on a timescale of 10*sup5* years on Earth's current human civilization, but may act on shorter or longer timescales elsewhere.	en_US
dc.format.extent	869763 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en_US
dc.subject.other	Cosmic Collision Spacefaring Galactic Civilization	en_US
dc.title	Cosmic Collisions and the Longevity of Non-Spacefaring Galactic Civilizations	en_US