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Clyde Tombaugh (1906-1997)

In 1930, American astronomer Clyde Tombaugh discovered Pluto, after a laborious search of sky photographs. He used a Blink Comparator to look for slowly moving objects against a background of fixed stars. Clyde Tombaugh (1906-1997).

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Clyde Tombaugh (1906-1997)

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  1. In 1930, American astronomer Clyde Tombaugh discovered Pluto, after a laborious search of sky photographs. He used a Blink Comparator to look for slowly moving objects against a background of fixed stars. Clyde Tombaugh (1906-1997)

  2. Telescopic pictures of the same part of the sky are taken on successive nights (or longer periods). The images are aligned as closely as possible, and viewed repeatedly one after the other (blinked). Brashear Blink Comparator (ca. 1947) The nearer object (planet, asteroid, or comet) is seen to move against the fixed background of stars. Tombaugh found Pluto in this manner. It has been a preferred method for finding asteroids.

  3. Astronomical imagery has become much more complex and sophisticated. This image of the pelican nebula, taken with the Hubble Space Telescope, displays the actual colors enhanced to accentuate them. Pelican Nebula

  4. This image is a screenshot from an award-winning movie depicting a three dimensional “flight” through the central region of the Orion Nebula.

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