Topsy-turvy motion creates light switch effect at Uranus

Uranus’ magnetosphere, the region defined by the planet’s magnetic field and the material trapped inside it, gets flipped on and off like a light switch every day as it rotates along with the planet, scientists have discovered. It’s ‘open’ in one orientation, allowing solar wind to flow into the magnetosphere; it later closes, forming a shield against the solar wind and deflecting it away from the planet.

Source:: Topsy-turvy motion creates light switch effect at Uranus

      

Mini-flares potentially jeopardize habitability of planets circling red dwarf stars

Solar flares and associated eruptions can trigger auroras on Earth or, more ominously, damage satellites and power grids. Could flares on cool, red dwarf stars cause even more havoc to orbiting planets, even rendering them uninhabitable? To help answer that question, astronomers sought to find out how many flares such stars typically unleash.

Source:: Mini-flares potentially jeopardize habitability of planets circling red dwarf stars