2015-03-11 BBC:星光七纪元-15（在线收听）

 But the sun's violent burst can harm us, its active nature is what allows us to live at all, because the sun also eject the solar wind, and energized stream of particles that head out into space, and that we can see passing-off as it bounces off our atmosphere, the aurorae. Then the solar wind flies on, putting on the same show at the poles of Jupiter, and Satur, too. Until finally one hundred earths' distance away, it loses its momentum and forms a boundary with deep space, creating a protective bubbl that shields our solar system from dangerous galatic radiation and cosmic rays, the heliousphere. within it, life on the planet just a right distance away can thrive. We are beneficiary of the energy the sun generates as nuclear fusion fights back against gravity.