Biology 1002B Lecture Notes - Lecture 3: Heat Capacity, Capillary Action, Covalent Bond
9 Sep 2013
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Hubble deep field: hubble telescope sits in a orbit around the earth, looks at what"s outside the milky way, (image shows all the other galaxies) Speed of light = 1. 1 billion km/h. Radio waves: one form of electromagnetic radiation, radio waves travel the speed to light so we can use them for astronomy. Only means fast enough to observe evidence of aliens. Can pick up any transmissions of radio waves sent out by life else where: must filter out background noise (stars) Any radio waves produced by a society would not be random, would have structure. N = number of advanced civilizations in our galaxy. Kepler mission: to detect extra solar planets. Looks at one narrow slice of milky way, and watches 150 stars. Detects the dip in the brightness of these starts. Transit method: looking for a regular decrease in brightness (planets going around the star) 2326 planets detected in that narrow slice.
