Contact With Alien Civilizations - Michael A.G.

Page 406 of 472

Page 406 of 472
Contact With Alien Civilizations - Michael A.G.

Page Content (OCR)

394 References 33. Darren M. Williams, et al., “Habitable Moons Around Other Planets,” Nature, Vol. 385 (16 January 1997), 234-236; Christopher F. Chyba, “Life on Other Moons,” Nature, Vol. 385 (16 January 1997), 201; Sullivan, 44; Darling, 89. Our solar system contains one moon with an atmosphere—Saturn’s large satellite Titan. Conditions on that body, particularly its intense cold, may be too extreme to allow life to evolve. 34. David J. Stevenson, “Life-Sustaining Planets in Interstellar Space?” Nature, Vol. 400 (1 July 1999), 32; Richard L.S. Taylor, “Planets Without Stars,” JBIS, Vol. 54 (2001), 19-26. 35. J. Kelly Beatty, “Distant Planetoid Sedna Baffles Astronomers,” Sky and Telescope, June 2004, 14-15; John Noble Wilford, “Scientists Find an Icy World Beyond Pluto, and the Solar System Suddenly Seems Bigger,” The New York Times, 16 March 2004; Brett Gladman, “The Kuiper Belt and the Solar System’s Comet Disk,” Science, Vol. 307 (7 January 2005), 71-75; David Tyrell, “The New Kings of the Kuiper Belt,” Sky and Telescope, October 2005, 28-31; Scott S. Shepard, “A Planet More, a Planet Less?” Nature, Vol. 439 (2 February 2006), 541-542; F. Bertoldi, et al., “The Trans-Neptunian Object UB 313 is Larger Than Pluto,” Nature, Vol. 439 (2 February 2006), 563-564. 36. Scott J. Kenyon and Benjamin C. Bromley, “Stellar Encounters as the Origin of Distant Solar System Objects in Highly Eccentric Orbits,” Nature, Vol. 432 (2 December 2004), 598-600; Dennis Overbye, “Sun Might Have Exchanged Hangers-On with Rival Star,” The New York Times, 2 December 2004; “Sedna’s Dark Origin,” Sky and Telescope, December 2004, 20; Kenneth Chang and Dennis Overbye, “Planet or Not, Pluto Now Has Far- Out Rival,” The New York Times, 30 July 2005; Kenneth Chang, “10 Planets? Why Not 11?”, The New York Times, 23 August 2005. 37. David Shiga, “Imaging Exoplanets,” Sky and Telescope, April 2004, 44-52. 38. Robert Irion, “The Search for Pale Blue Dots,” Science, Vol. 303 (2 January 2004), 30-32. 39. Darling, 174; Ben Zuckerman, “Searches for Electromagnetic Signals from Extraterrestrial Beings,” in Hart and Zuckerman, editors, 9-17. Astronomers detected hydrogen from the atmosphere of an extrasolar planet in 2003. See David Charbonneau, “Atmosphere Out of that World,” Nature, Vol. 422 (13 March 2003), 124-125; James F. Kasting, “When Methane Made Climate,” Scientific American, July 2004, 78-85. 40. “Boiling Planets,” Science, Vol. 303 (19 March 2004). 41. Giovanna Tinetti, “Detecting Biosignatures in Extrasolar Terrestrial Planets,” SETI Institute Explorer, 2006, 12-13, 37; Clark and Clark, 226. 42. Rood and Trefil, 124-125; Peter D. Ward and Donald Brownlee, Rare Earth: Why Complex Life is Uncommon in the Universe, NY, Copernicus, 2000, 250-251, 257-275; William C. Burger, Perfect Planet, Clever Species: How Unique Are We?, Amherst, NY, Prometheus, 2003, 282; Grinspoon, 91; Isaac Asimov, Extraterrestrial Civilizations, 21-24; Isaac Asimov, “The Triumph of the Moon,” Fantasy and Science Fiction, July 1973, 137-147; Darling, 97. 43. H. Strughold, “The Ecosphere in the Solar Planetary System,” paper pre- sented at the International Astronautical Congress in September 1956. 44. Philip Ball, “Water, Water, Everywhere?” Nature, Vol. 427 (1 January 2004), 19-20.