... Tune into the Asteroid Day press conference . ... Solar wind tans young asteroids . ... After undergoing a catastrophic collision, the color of an asteroid gets modified rapidly by the solar wind so that it resembles the mean color of extremely old asteroids. ... This study has confirmed that the solar wind is the most likely cause of rapid "space weathering" in asteroids. ... The charged, fast-moving particles in the solar wind damage the asteroid's surface at an amazing rate," Vernazza said. ...