Andrei Dmitrievich Sakharov was born on May 21, 1921 in Moscow, then in the USSR. He took part to Soviet nuclear program and seeing the weapons power helped him to develop his activism against atomic proliferation. In 1975 he was awarded a Nobel Peace Prize.
The Gravity Probe B space mission has confirmed two predictions derived from Albert Einstein’s theory of general relativity measuring the geodetic and frame-dragging effects.
The GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) satellite was launched in an ESA mission about two years ago with the aim of taking measurements of the geoid with a precision never achieved before. With its gradiometer, an very sensitive gravity detection instrument, the GOCE has collected enough data to create the most accurate image of the Earth we’ve ever seen.
The great astrophysicist Subrahmanyan Chandrasekhar was born exactly a hundred years ago. He was born in Lahore, Punjab, at the time part of India under the British domain, today in Pakistan.