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" "The universe is all extremes. Monstrous gravity fields, or next-to-nothing ones; extreme cold, or heat so intense that solids and liquids cannot exist; multimillion atmosphere pressures, or near-vacuum.
Ice or fire. Niflheim or Muspelheim: the ancient alternatives, imagined by humans long before the Expansion.
It’s planets that are the oddities; the strange neutral zone between suns and space, the thin interface where moderate temperatures and pressures and gravity fields can exist. And if planets are anomalies, then planets able to support life are rarer yet—a zero-measure subset in that set of strangeness.
And within that alien totality, where do humans fit?
Charles Sheffield (25 June 1935 – 2 November 2002) was an English-born mathematician, physicist and science fiction writer who served as a President of the Science Fiction and Fantasy Writers of America and of the American Astronautical Society.
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It was the classic question; you had two tasks to perform and one promised to be much harder and more unpleasant than the other. Did you tackle the tough one first and get it out of the way? Or did you postpone, and hope that before you came to the hard part you might be struck by a meteorite, or that a solar flare would wipe out life in the solar system?
The Asteroid Belt contains everything from substantial bodies like Ceres, seven hundred and fifty kilometers across, all the way down to house-sized boulders, pebbles, and grains of sand. One good rule of thumb is that for every object of a given size, there will be ten times as many one-third that size.