FROM an experimental point of view, Einstein's general theory of relativity is at present in an ambiguous position. It is well known that there are three conceivable tests between its conclusions and ...

Astronomers utilized the Hubble Space Telescope to achieve the first measurement of gravitational light deflection caused by an extrasolar star, Stein 2051B, a white dwarf, as it passed in front of a ...

Astronomers have used the sharp vision of NASA’s Hubble Space Telescope to repeat a century-old test of Einstein’s general theory of relativity. The Hubble team measured the mass of a white dwarf, the ...