The Extrasolar Planetary Foundation Link Page

"With 10 to the 11th stars in our galaxy and 10 to the 9th other galaxies, there are at least 10 to the 20th stars in the universe. Most of them may be accompanied by solar systems. If there are 10 to the 20th solar systems in the universe, and the universe is 10 to the 10th years old -- and if, further, solar systems have formed roughly uniformly in time -- then one solar system is formed every 10 to the negative 10 yr = 3 x 10 to the negative 3 seconds. On the average, a million solar systems are formed in the universe each hour."
Shklovskii, I.S. and Carl Sagan. Intelligent Life in the Universe . New York: Dell Publishing, 1966. 509p. Pg. 130.

LINKS to other EXTRASOLAR PLANETARY SITES

1. The Extrasolar Planetary Encyclopedia
2. The Allegheny Obsevatory
3. Mt. Wilson Observatory
4. Extrasolar Visions
5. Extrasolar Research
6. The SETI Institute
7. The Kepler Mission - NASA
8. Other Worlds - Distant Suns
9. Scientific American - A Parade of New Planets
10. Dr.s Marcy and Butler - San Francisco State University
11. Darwin - Space infrared interferometry
12. 51 Pegasi - Planetary Orbit Discovered
13. Exoplanets
14. The Keck Interferometer
15. Pulsar Planets - Wolszczan
16. Exploration of Neighboring Planetary Systems (ExNPS) Study - NASA
17. Origins - NASA
18. GALEX (Galexy Evolution Explorer) NASA
19. SIRTF (Space Infrared Telescope Facility)





"The implication is that solar systems are common, but the argument will be greatly strengthened if there is real agreement on how our solar system came about. The space exploration of the next decade should enable us to narrow down the theories to a great extent. We will have samples of the Moon and direct knowledge as to the nature of its interior. We will learn the precise compositions of other planets and their atmospheres to compare with those of our Earth. However, study of our own solar system is not the only way to learn if it is unique. Another approach is to search for clues among the other stars of our galaxy. Such observations, carried out originally without reference to the question of whether or not there are planets elsewhere, led to surprising discoveries..."
Sullivan, Walter. We Are Not Alone: The Search for Intelligent Life on Other Worlds . New York: McGraw-Hill, 1964. 325p. Pg. 43.



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