jul 232012
 
Unexpectedly Slow Motions Below the Sun's Surface

  New observations of seismic oscillations on the Sun’s surface from NASA’s SDO mission challenge our understanding of interior solar dynamics. Pattern of convection at the surface of the Sun observed by the SDO/HMI instrument. Credit: MPS/NASA The interior motions of the Sun are much slower than predicted. Rather than moving at the speed of [continue reading]