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great minds

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Alexander, James Waddell, II born September 19, 1888, Sea Bright, New Jersey, U.S. ? died September 23, 1971, Princeton, New Jersey American mathematician and a founder of the branch of mathematics originally known as analysis situs, now called topology.

The Search for Extraterrestrial life

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The Search for Extraterrestrial Life Rafael Almanzar We will talk about the steps being taken currently to find life outside of our solar system. 1 Three Steps Search for Exoplanets SETI Space Rover Official message from white house website. 2 Search for Exoplanets Radial Velocity or Doppler Method Transit Method Transit Timing Variation (TTV) Doppler Method: As a planet orbits a star, the star also moves in its own small orbit around the system's center of mass. Variations in the star's radial velocity?? that is, the speed with which it moves towards or away from Earth?? can be detected from displacements in the star's spectral lines due to the Doppler effect.

Astronomy

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Science Notes Ancient Models of the World Egypt Thought world was flat Thought sky was a flat plate supported by mountains Thought the sun traveled along the Nile India Thought world was circular disk surrounded by and ocean Thought the center of the world was a mountain Thought the sun went around the mountain once a day In the nighttime it went behind the mountain and came out in the morning Greece Thought Earth floated in the ocean like a cork One man thought Earth was a cylinder with a rounded top that floated in the air Thought that beyond the sky was a region of fire The sun, stars, and moon were holes in the sky, through which the fire could be seen NOTE: All of these incorporate local features General Astronomy

human geography

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