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aliens and astrobiology
Transcript of aliens and astrobiology
Wikipedia, Astrobiology. Retrieved on May 23, 2011 from
Daily Galaxy, Life on Mars. Retrieved on May 23, 2011 from
Si Live, Nasa Discovers Life. Retrieved on May 24, 2011 from
Wikipedia, Spectroscopy. Retrieved on May 24, 2011
Wikipedia, Direct Image. Retrieved on May 24, 2011
Google Books, Drakw Equation. Retrieved on May 25, 2011
Planetary, SETI. Retrieved on May 25, 2011
SETI League, Drake Equation. Retrieved on May 25, 2011
http://www.setileague.org/general/drake.htm Since Earth is the only known place to currently have life, astrobiologists work by basing all theories on Earth. However, due to new discoveries in the universe, assumptions about possibilities of life are higher because other habitable zones have been found, such as signs of water on Mars. Scientists hypothesize that wherever water, atmosphere, minerals, and reasonable temperatures occur, there very well should have been life at one point. Mars shows signs that there used to be water, an atmosphere, and gravity. NASA was first to discover clues about possible life on Mars after studying rocks and images taken from its surface. If there is extraterrestrial life, it is not big alien monsters like you see in movies. They would be microscopic organisms like bacteria. Isaac Newton and his laws of physics relate to the Solar System. He explained why planets move the way they do and how it effects them.
Charles Darwin tried to explain how the first life came about and how it evolved.
There is not one single person who started the study of astrobiology, but over hundreds of years, theories like Newton's and Darwin's have been put together to try to help explain whether there is other life in the universe. In order to help in the studying of astrobiology, scientists use data collected by space probes, satellites, rovers, ground/space-based telescopes, observatories, spectrometers and other photographic equipment. The observations that astronomers and astrobiologists use are divided into two types: direct imaging and spectroscopy.
Direct Imaging- a continuous mapping of topographical spaces.
Spectroscopy- the interaction between matter and radiated energy. SETI is the acronym for the Search for ExtraTerrestrial Life. It searches for electromagnetic signals from other possible civilizations in the universe. SETI projects are happening all over the world by astrobiologists. Most scientists believe that radio signals are the best way to communicate across the enormous distance that separates us from other galaxies. In 1961, astromoner Dr. Frank Drake created the Drake Equation which provides a way to estimate the number of worlds in the Milky Way galaxy that have had radio transmissions detected from them, suggesting intelligent life. However, there is no correct solution to the equation because no one is sure if there really is other life. His current estimate is 10,000 communicative civilizations in our galaxy. N=R f n f f f L p e l i c *