Some of Johannes Kepler's inventions are the refracting telescope, eyeglass lenses, Rudolphine tables, log books and the discovery of a supernova. His works and ideas guided many famous scientists like Isaac Newton to de... More »

A dead star is a star that has exhausted all its fuel for nuclear fusion and is simply the core of the former star floating through space. The size of the star before it uses up all its fuel determines what happens to it... More »

Some of the contributions of Johannes Kepler include explanation of planetary movement, invention of an improved version of the refracting telescope and authorship of a number of books. He is highly regarded as an astron... More »

Johannes Kepler was the founder of celestial mechanics and was the first person to design eyeglasses for near and far-nearsightedness. He made many other contributions to the field of science. More »

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Johannes Kepler died in Regensburg, Germany on November 15, 1630, after a short battle with an illness, most likely a fever. His death occurred while he was on his way home to Sagan, Germany to collect a debt. More »

Notable inventions of the 1980s include the hepatitis-B vaccine, MS-DOS, IBM-PC, the scanning tunneling microscope, the human growth hormone, The Apple Lisa, contact lenses, Cabbage Patch Kids dolls, CD-ROM and the Apple... More »

Hans Lippershey, a spectacle maker, invented the telescope after seeing his two children, who were playing in his shop, make a weather vane appear larger and clearer by looking through two lenses. Lippershey realized the... More »