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Astro*Dictionary by Michael Erlewine





1 article for "Lebedev, Pyotr Nicolaievich"

Lebedev, Pyotr Nicolaievich [Astro*Index]


(1866-1912) Russian physicist.

In 1901, he was able to observe and measure the pressure exerted by light, using very light mirrors in a vacuum. This result explains why the tails of comets point away from the Sun, regardless of whether the comet is approaching or receding from the Sun.


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