A dark and mysterious ‘rogue planet’ has been discovered — and it looks a lot like Earth
A dark and mysterious ‘rogue planet’ has been discovered — and it looks a lot like Earth Gravitational lensing Anything with mass bends space and causes light to deflect from a straight path. The result is that an object with mass focuses the light from a source behind it – amplifying it like a huge magnifying glass. This is calledgravitational lensing. It was predicted by Einstein’sgeneral theory of relativityand wasfirst verifiedwhen stars were seen to be displaced from their usual positions when viewed close to the Sun while it was perfectly eclipsed by the Moon in 1919....