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]

jul 092012
 
Researchers Create “MRI” of the Sun’s Interior

  A team of scientists has created an “MRI” of the Sun’s interior plasma motions, shedding light on how it transfers heat from its deep interior to its surface. The result, which appears in the journal the Proceedings of the National Academy of Sciences, increases our understanding of how heat is transported outwards by the Sun [continue reading]

jul 032012
 
Clues to Solar Storms

  Doppler measurements that help track storms on Earth may also be useful for understanding storms on the sun. Left, image of hot (1.8-million degree Fahrenheit) active region loops. Right, flows of solar plasma (blue shifts). Credit: SDO/AIA (NASA and Hinode/EIS (JAXA, NASA, ESA and STFC) A Rice University astrophysicist is part of an international [continue reading]

jul 012012
 
Space Tornadoes Power the Atmosphere of the Sun

  Mathematicians at the University of Sheffield, as part of an international team, have discovered tornadoes in space which could hold the key to power the atmosphere of the Sun to millions degrees of kelvin. Three images show how the tornado developed over a few hours. Image credit: Aberystwyth University The super tornadoes – which are thousands [continue reading]

jun 302012
 
Confirmed: Titan has a Subsurface Ocean!

  Nothing like it has been seen before beyond our own planet: large tides have been found on Saturn’s moon Titan that point to a liquid ocean – most likely water – swirling around below the surface. A possible scenario for the internal structure of Titan, which includes a global subsurface ocean beneath an icy [continue reading]