crab nebula

Iosif Shklovsky and the Search for Intelligent Life in the Universe

Iosif Shklovsky and the Search for Intelligent Life in the Universe

On July 1, 1916, Soviet astronomer and astrophysicist Iosif Shklovsky was born. Shklovsky identified the continuum radiation of the Crab Nebula as synchrotron radiation, and he linked x-ray stars to binary systems containing a neutron star. He is also remembered for his 1962 book on extraterrestrial life, the revised and expanded version of which was co-authored by American astronomer Carl Sagan in 1966 as ‘Intelligent Life in the Universe’. Iosif Shklovsky studied at…
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William Parsons and his Very Large Telescopes

William Parsons and his Very Large Telescopes

On June 17, 1800, Irish astronomer William Parsons, 3rd Earl of Rosse, was born. As an astronomer, he had several telescopes built, among them his 72-inch telescope, built in 1845 and colloquially known of as the “Leviathan of Parsonstown“, which was the world’s largest telescope, in terms of aperture size, until the early 20th century. In 1848, he found and named the Crab Nebula (because he thought it resembled a crab), by which name…
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