Mathematics – Logic
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..757m&link_type=abstract
Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B
Mathematics
Logic
Interstellar Space, Extraterrestrial Intelligence, Red Giant Stars, Solar Sails, Extrasolar Planets, Aerospace Vehicles, Planetary Systems, Stellar Interiors
Scientific paper
Interstellar migrations may occur when a civilization's star enters the red giant phase, thereby dooming the life-bearing planet. Ecologically self-contained 'world ships', massing billions of kilograms and propelled by hyperthin, space manufactured solar sails thousands of kilometers in diameter unfurled near the home star are possible vehicles to transfer a threatened civilization to a neighboring star. Consideration of the nearest red giants reveals that Pollux is the nearest formerly solar-type red giant. Known stellar neighbors of Pollux are surveyed to determine likely directions for an interstellar migration departing Pollux. Such migrations might consist of many world ships launched over millennia on voyages of about 1000 terrestrial-year duration; discovery of such events will be serendipitous. The difficulties of observing solar-sail star ships near Pollux are considered. A facility dedicated to imaging extrasolar planets within 10 parsecs might be capable of detecting these large spacecraft.
Matloff Gregory L.
Pazmino John
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