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Meghnad Saha
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<p>Meghnad Saha (6 October 1893 – 16 February 1956) was an Indian <a href="/facts/Astrophysicist/krFPRWLA">astrophysicist</a> and politician who helped devise the theory of <a href="/facts/Thermal_ionization/UJnkjDtQ">thermal ionisation</a>. His <a href="/facts/Saha_ionization_equation/AoapeRzM">Saha ionisation equation</a> allowed astronomers to accurately relate the <a href="/facts/Stellar_classification/dYrIuK9H">spectral classes</a> of <a href="/facts/Stars/euBFuo07">stars</a> to their actual temperatures. </p>