Written by William Sheehan, a noted historian of astronomy, and Christopher J. Conselice, a professional astronomer specializing in galaxies in the early universe, this book tells the story of how astronomers have pieced together what is known about the vast and complicated systems of stars and dust known as galaxies. The first galaxies appeared as violently disturbed exotic objects when the Universe was only a few 100 million years old. From that tortured beginning, they have evolved though processes of accretion, merging and star formation into the majestic spirals and massive ellipticals that dominate our local part of the Universe. This of course includes the Milky Way, to which the Sun and Solar System belong; it is our galactic home, and the only galaxy we will ever know from the inside. Sheehan and Conselice show how astronomers’ understanding has grown from the early catalogs of Charles Messier and William Herschel; developed through the pioneering efforts of astronomers like E.E. Barnard, V.M. Slipher, Henrietta Leavitt, Edwin Hubble and W.W. Morgan; and finally is reaching fruition in cutting-edge research with state-of-the-art instruments such as the Hubble Space Telescope that can see back to nearly the beginning of the Universe. By combining archival research that reveals fascinating details about the personalities, rivalries and insights of the astronomers who created extragalactic astronomy with the latest data gleaned from a host of observa tions, the authors provide a view of galaxies – and their place in our understanding of the Universe – as they have never been seen before.
The first galaxies appeared as violently disturbed exotic objects when the Universe was only a few 100 million years old.
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Shows the forms of life within the Galactic Federation, an area of interstellar space nearly six hundred light years across
Describes the epic voyage of a single ship and its crew toward the very heart of the galaxy.
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Worlds at War: An Illustrated Study of Interplanetary Conflict
Stars are usually not directly 'kicked out' of the galaxies by galactic encounters, i.e. they do not acquire positive energies from the encounter. Therefore, the (indirect) mass loss will strongly depend on the tidal radius and hence on ...
space patrol
Having investigated peculiar galaxies for more than two decades , Zwicky made a strong case that observations of close encounters between galaxies could provide insight into the differences in formation that lead to ordinary spirals and ...
4 GALACTIC EVOLUTION RESULTING FROM INTERACTIONS In the previous sections we have attempted to show the important role played by the interstellar medium during galactic interactions — both in terms of the record of the encounter left in ...