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Category: Astronomy

Leslie speaker, Doppler effect and the Nobel Prize in Physics 2019

Leslie speaker, Doppler effect and the Nobel Prize in Physics 2019

The Nobel Prize in Physics 2019 was awarded “for contributions to our understanding of the evolution of the universe and Earth’s place in the cosmos” with one half to James Peebles “for theoretical discoveries in physical cosmology”, the other half jointly to Michel Mayor and Didier Queloz “for the discovery of an exoplanet orbiting a solar-type star.” In this sub-section we will try to understand how Michel Mayor and Didier Queloz discovered the first ever exoplanet – 51 Pegasi b…

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Van Gogh’s The Starry Night, Turbulence and Adaptive optics

Van Gogh’s The Starry Night, Turbulence and Adaptive optics

Van Gogh’s The Starry Night is a stunning painting that artistically brings out the effect of turbulence in our atmosphere. And this turbulence of air in addition to the effect of varying refractive index of the layers in our atmosphere causes the twinkling of stars: If you are an astronomer trying to study the cosmos from the earth, this turbulence of air and twinkling of stars is a total nightmare. The last thing that you want the light that painstakingly…

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