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Universe, Volume 6, Issue 1 (January 2020) – 19 articles
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Cover Story (view full-size image) One hundred years ago, two British expeditions measured the deflection of starlight by the Sun’s [...] Read more. One hundred years ago, two British expeditions measured the deflection of starlight by the Sun’s gravitational field, confirming the prediction made by Einstein’s General Theory of Relativity. Today, many physicists around the world are involved in studying the consequences of this confirmation and using the deflection of light by gravitational fields as a research tool, a discipline with the generic name of gravitational lensing. This current Issue contains a historical review to commemorate the centenary of those eclipse expeditions and gives an account of the development and milestones of gravitational lensing. This Issue's cover picture shows a simple diagram of the apparent shift of a star´s position during an eclipse, while the background image shows an Einstein ring, one of the many beautiful and dramatic gravitational lensing effects.View this paper.