Tags: space, antarctica, january, scientists, released, balloons, nasa-funded, mission, called, barrel, balloon, launched, team, floated, days, measuring, x-rays, produced, fast-moving, electrons, atmosphere
Tags: space, black, hole-powered, electrons, sub-atomic, particles, streams, center, galaxy
Tags: space, streaming, center, galaxy, cosmic, searchlight, natures, amazing, phenomena, black-hole-powered, electrons, sub-atomic, particles, traveling, nearly, speed, light