Charles Sheffield (June 25, 1935–November 2, 2002), English born mathematician, physicist and science fiction author. He had been a President of the Science Fiction and Fantasy Writers of America and of the American Astronomical Society.
His novel The Web Between the Worlds, featuring the construction of a space elevator, was published almost simultaneously with Arthur C. Clarke's novel about that very same subject, The Fountains of Paradise, a coincidence that amused them both.
For some years he was the chief scientist of Earth Satellite Corporation, a company analysing satellite data. This resulted in many technical papers and two popular non-fiction books, Earthwatch and Man on Earth, both collections of false colour and enhanced images of Earth from space.
He had been writing a column for the Baen Books web site; his last column concerned the discovery of the brain tumour that led to his death.