By Deborah Todd, Joseph A. Angelo

This reference for basic readers and scholars in highschool and up compiles biographies of approximately a hundred thirty scientists in house and astronomy, from antiquity to the current. every one access presents beginning and dying dates and knowledge on fields of specialization, and examines the scientist's paintings and contributions to the sphere, in addition to relations and academic heritage. approximately 50 b&w pictures are incorporated. Entries are listed via box, nation of start, and kingdom of medical job, and chronologically. Todd is a contract author. Angelo is a retired lieutenant colonel with the U.S. Air strength.

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Reported in the Proceedings of the Royal Society in 1932, the newly discovered positron became one of the first new fundamental particles. Anderson had discovered antimatter. Anderson still wanted more. Despite the fact that his research was taking place during the Great 18 Ångström, Anders Jonas Depression, when funding was virtually nonexistent, he wanted to see what else he could find at different altitudes and latitudes. Anderson enlisted the help of graduate student Seth Neddermey to perform what became known as the Pike’s Peak experiment, in which they, with great difficulty and many setbacks, took their Wilson chamber to an elevation of 14,000 feet and spent six weeks photographing particles.

Titled Aryabhata “On the Influence of Carbonic Acid in the Air upon the Temperature of the Ground,” the paper anticipated by decades contemporary concerns about the greenhouse effect and the rising carbon dioxide (carbonic acid) content in Earth’s atmosphere. In the article, Arrhenius argued that variations in trace atmospheric constituents, especially carbon dioxide, could greatly influence Earth’s overall heat (energy) budget. During the next 10 years, Arrhenius continued his pioneering work on the effects of carbon dioxide on climate, including his concern about rising levels of anthropogenic (humancaused) carbon dioxide emissions.

Aristotle changed the spherical layout Eudoxus had devised by adding 22 more spheres to explain how the motion of some of the spheres worked in a way that would not interfere with the motion of others. With the Earth at the cen- ter, there were now 55 concentric spheres, all attached, all rotating at different velocities, working in the complex way that an organism works. Aristotle also used this system to explain why stars twinkled. It was the movement of the spheres, he concluded, that caused friction and heated the air around a star, “particularly in the part where the sun is attached to it,” and that friction explained why a star shines.

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