Get A History of Astronomy from Thales to Kepler (2nd Edition) PDF

By J. L. E. Dreyer

ISBN-10: 0486600793

ISBN-13: 9780486600796

A masterpiece of ancient perception and medical accuracy, this is often the definitive paintings on Greek astronomy and the Copernican Revolution. starting with the traditional Egyptians, it levels from the Pythagoreans and Plato to medieval ecu and Islamic cosmologies, concluding with detailed surveys of the works of Copernicus, Brahe, and Kepler.

Formerly titled: historical past of the Planetary structures from Thales to Kepler

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Additional info for A History of Astronomy from Thales to Kepler (2nd Edition) (Dover Books on Astronomy)

Sample text

As the particles bombard oxygen and nitrogen in the upper atmosphere, the atoms release photons of light that we see as the auroral colors. The details of the science remain uncertain. In 2007, NASA launched the Themis mission to study the interaction between the solar wind and Earth’s magnetosphere. The mission hopes to identify which of the several theories connecting solar storms with aurorae might be correct. At time of writing, Themis’s mission has been extended. It could help us unlock the aurora’s secrets.

These are a pair of hot diamonds, two stars of spectral type A first separated at the dawn of the age of the telescope. Mizar and Alcor are close to one another, but do they interact? For a long time, we were not sure. Separated by some 3 light years they are traveling at comparable velocities, indicating that they started from a single beginning, and data gathered in 2009 does seem to demonstrate that Alcor is bound to Mizar with an orbital period of some 75,000 years. It is worth remembering this number and then renewing the observation – the tiny gap we can resolve between the stars represents this vast stretch of distance and time.

His chosen site was Abbaseeyeh, 3 miles from Cairo on the edge of the desert. There he found what he was looking for, a place with no lights that interfered with measuring the relative brightness of some 2,000 stars. The results were published in 1885 in his book Uranometria Nova Oxoniensis. This represents an extreme solution, but dark sky centers and even dark sky islands are now being marketed to meet the challenge of the light. They are a response to a phenomenon of the modern age. For the first time in human history, we are losing our sense of the stars.

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A History of Astronomy from Thales to Kepler (2nd Edition) (Dover Books on Astronomy) by J. L. E. Dreyer

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