Comets and Galaxies

Feb 01, 2013 Galactic tails, bright comas, and central nuclei are reminiscent of comets. What is a comet? Most astronomers think comets are small, fragile, irregularly shaped objects composed mostly of water ice and dust, along with carbon and silicon-based compounds. “Dirty snowballs,” as Fred Whipple described them in 1950….

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On the Shoulders of Suppressed Giants Part Two

  From left to right: F. Gutekunst, Ignatius Loyola Donnelly (c. 1898). Courtesy Minnesota Historical Society, Saint Paul, Minnesota. Anonymous, William Comyns Beaumont (date unknown). Bob Kobres, Immanuel Velikovsky (1978)   Jan 23, 2012 In bestsellers published in 1882 and 1883, the American politician and amateur scientist Ignatius Loyola Donnelly (1831-1901) perpetuated the enthralling hypothesis of…

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Phobos

The north pole of Phobos. Credit: ESA/DLR/FU Berlin (G. Neukum)

  Jan 21, 2013 Did meteor bombardment scar Phobos? Phobos is the largest of the two moons of Mars. Deimos is so small that studying its surface has been problematic for astronomers because it cannot be readily observed from Earth. Only the Viking 2 orbiter, and more recently, the HiRise…

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