January 7, 2014

Astronomical Oddity Will Test Einstein Again

Ken Croswell, Physics World

AP Photo

Astronomers have discovered the first pulsar with two stars circling it. By watching the three objects orbit one another, observers will soon be able to perform the best-ever test of the "strong equivalence principle", which is a key prediction of Albert Einstein's general theory of relativity.

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TAGGED: General Relativity, White Dwarf Stars, Gravity, Nordtvedt Effect, Pulsars


Astronomers using the National Science Foundation's Green Bank Telescope (GBT) have discovered a unique stellar system of two white dwarf stars and a superdense neutron star, all packed within a space smaller than... more ››
January 4, 2014
Is Earth Surrounded by Dark Matter?
Ian O'Neill, Discovery News
Dark mater: The stuff that possesses mass, yet refuses to interact with radiation, so we can't 'see' it. Its nature has eluded scientists for decades, but there could be a reservoir of the stuff sitting right on our doorstep... more ››