This is a Digitized Sky Survey image of the oldest star with a well-determined age in our galaxy. The ageing star, catalogued as HD 140283, lies over 190 light-years away. The NASA/ESA Hubble Space Telescope was used to narrow the measurement uncertainty on the star's distance, and this helped to refine the calculation of a more precise age of 14.5 billion years (plus or minus 800 million years).
Heisenberg's uncertainty principle graces every undergraduate quantum physics textbook in the world. But a proof for a key aspect of it - one that encapsulates the uncertainty that measurement introduces into a system - has never been proven directly. That has just changed... http://www.nature.com/news/proof-mooted-for-quantum-uncertainty-1.13270?WT.mc_id=PIN_NatureNews
Particles Walk Through Walls While Physicists Watch. Clara Moskowitz, LiveScience senior writer, 'Electrons bound to an atom can sometimes escape, even if they lack the requisite energy, through a phenomenon known as quantum tunneling'.