The Search for ExtraTerrestrial Intelligence (Do Extraterrestrials know humans Exist?)

1. The Search for ExtraTerrestrial Intelligence(Do Extraterrestrials know humans Exist?) By Dr. Harold Williams of Montgomery College Planetarium http://montgomerycollege.edu/Departments/planet/ at Takoma Park, Maryland, USA, Planet Earth, (the third major planet) around the star Sol in the Milky Way Galaxy in the Local Group and outlying member of the Virgo super cluster in the universe 13.7billion years after creation.

2. Space contain such a huge supply of atoms that all eternity would not be enough time to count them and the force which drives the atoms into various places just as they have been driven together in this world. So we must realize that there are other worlds in other parts of the universe, with races of different men and different animals. Lucretius, Roman philosopher, 1st century BCE translated by Mary-Kay Gamel.

3. Heaven and earth are large, yet in the whole of space they are but as small grain of rice. It is as if the whole of empty space were a tree, and heaven and earth were one of its fruits. Empty space is like a kingdom, and heaven and earth no more than a single individual person in that kingdom. Upon one tree there are many fruits, and in one kingdom many people. How unreasonable it would be to suppose that besides the heaven and earth which we can see there are no other heavens and no other earths?Teng Mu, Chinese philosopher 13th century AD, translated by Joseph Needham

4. It sure would be a waste of space.Said by Jodie Foster while portraying Ellie Arroway in the movie “Contact” whose screen play was written by Carl Sagan.

5. Absence of evidence is not evidence for absence.35 hit on google.com on May 10, 2003. Many but not all on UFO sights.

6. Extraordinary claims require extraordinary evidence.181,000 hit on google.com on May 10, 2003. Generally attributed to Carl Sagan.

7. Frank Drake

8. N = R* fp ne fl fi fc L Where, N = The number of civilizations in The Milky Way Galaxy whose electromagnetic emissions are detectable. R* =The rate of formation of stars suitable for the development of intelligent life. fp = The fraction of those stars with planetary systems. ne = The number of planets, per solar system, with an environment suitable for life. fl = The fraction of suitable planets on which life actually appears. fi = The fraction of life bearing planets on which intelligent life emerges. fc = The fraction of civilizations that develop a technology that releases detectable signs of their existence into space. L = The length of time such civilizations release detectable signals into space.

9. Tobacco mosaic, a RNA virus 0.01mm long. Principally composed of CHON.

13. Microscopic filament resembling modern bacteria found in 3.5-billion-year-old chert of the Pilbara Block in northwestern Australia.

14. . Drawing of modern bacteria similar to microscopic fossil found in 3.5-billion-year-old chert of the Pilbara Block in northwestern Australia.

15. Trilobite the size of a human hand who lived on the ocean floor 400 million year ago during the Cambrian epoch and is now found in a limestone deposit in Pennsylvania.

18. Stanley Miller in 1999

24. Modern Stromatolites

28. Life zones around different types of stars

29. Gliese 581

30. Pioneer spacecraft Plaque

31. Voyager Spacecraft Plaque

32. Arecibo Puerto Rico, http://www.naic.edu/

38. Atomic hydrogen, 1H Has a radio transition at 21 centimeters or 1,420 Megahertz,. electron and proton aligned or opposite Deuterium, 2H, heavy hydrogen Has a radio transition at 93 Centimeters or 327 Megahertz electron and nucleus aligned or opposite Tritium, 3H, heavy heavy hydrogen Has a radio transition at 19.6 centimeters or 1,516.7 Megahertz electron and nucleus aligned or opposite

39. SETI@home band

40. Fast Fourier Transform (FFT)

41. Broad Band Radio Frequency Interference

42. Narrow Radio Frequency Interference

44. Triplets