Get 101 Fun Facts on Astronomy PDF

By Kevin Manning

Astronomy is the main intriguing and enjoyable subject within the universe. after all, i'm a section biased, yet don't you compromise? utilizing a telescope to work out the invisible and glance a ways again in time, exploring the universe to profit approximately meteors, the Moon, comets, asteroids, famous person clusters, nebulae and galaxies, and attempting to comprehend the position of black holes, darkish topic, and darkish power, are all lined during this relaxing textual content.

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In addition to the usual two sets of spectral lines that shifted back and forth as two stars orbited each other, he found a narrow line of ionized calcium that did not move. The line did not shift because it was not associated with the stars. Hartmann had discovered that the space between stars was not an empty void but contained a thin veil of gas. Vesto Slipher at Lowell Observatory confirmed Hartmann’s discovery in 1908 when he also found lines of calcium in the spectra of double stars. Slipher provided evidence for interstellar gas in three widely spaced regions of the Milky Way.

All but a few are in the thickest part of the Milky Way in the constellation Sagittarius. In 1917, Harlow Shapley mapped out the 3D distribution in space of the 93 globular clusters then known. He found that the clusters formed a spherical system with a center point about 50,000 light-years from the Sun in the direction of the constellation Sagittarius. ) Shapley 32 Twentieth-Century Science |Space and Astronomy By measuring the period during which stars vary in brightness, their absolute brightness can be found and, from this, their distance.

Hertzsprung plots stellar magnitudes against colors V. M. Slipher determines that Virgo and Andromeda nebulae rotate Niels Bohr formulates the theory of atomic structure Albert Einstein put forward his general theory of relativity: summarized in his 1916 paper “The Foundation of the General Theory of Relativity” MILESTONES 1911 1912 V. M. Slipher takes first measurements of galactic radial velocity 1913 1914 Harvard spectral classes adopted by International Astronomical Union Walter Adams and Arnold Kohlschütter discover spectroscopic parallax Robert H.

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101 Fun Facts on Astronomy by Kevin Manning

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