Latest Helioseismology Stories

What's Lurking Beneath The Surface Of The Sun?
2014-04-21 12:49:25

NASA Like a balloon bobbing along in the air while tied to a child's hand, a tracer has been found in the sun's atmosphere to help track the flow of material coursing underneath the sun's surface. New research that uses data from NASA's Solar Dynamics Observatory, or SDO, to track bright points in the solar atmosphere and magnetic signatures on the sun's surface offers a way to probe the star's depths faster than ever before. The technique opens the door for near real-time mapping of...

Scientists Observe Magnetic Flow On The Sun
2013-08-28 19:43:38

Lee Rannals for redOrbit.com – Your Universe Online NASA's Solar Dynamics Observatory has helped scientists figure out a little more about what is going on inside the sun. The SDO has an instrument onboard known as the Helioseismic and Magnetic Imager (HMI). This instrument has allowed scientists to observe a two-level system of circulation within the sun. Understanding this circulation will be especially important in the coming months as the sun's magnetic poles flip. The sun is...

Why Is The Sun So Perfectly Round?
2012-08-17 07:40:10

April Flowers for redOrbit.com - Your Universe Online On a summer's day, the sun dominates the sky looking for all the world like a big, round ball of light. Round is exactly what it is, it turns out. It is nearly the roundest object ever measured, according to a study from the University of Hawaii's Institute for Astronomy. If you scaled the sun down to the size of a beach ball, it would be so round that the difference between the widest and narrowest diameters would be much less than...

2012-07-09 10:55:42

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, upends our understanding of how heat is transported outwards by the Sun and challenges existing explanations of the formation of sunspots and magnetic field generation. The work was conducted by researchers from NYU's Courant Institute of...

SDO Helps Measure Magnetic Fields On The Sun's Surface
2012-01-19 13:34:38

[ Watch the Video ] A subset of data that helps map out the sun's magnetic fields was recently released from the Solar Dynamics Observatory (SDO). Observations that measure the strength and direction of magnetic fields on the solar surface -- known as vector magnetograms -- play a crucial role in understanding how those fields change over time and trigger giant eruptions off the surface of the sun such as solar flares and coronal mass ejections (CMEs). Collecting the information needed...

Image 1 - The Turbulent Lives Of Stars
2011-09-16 07:43:58

  The stars are boiling! The reason is the energy generated in the center of the star that wants to escape. If this does not happen quickly enough, the star starts to ℠boil´ in the outer layers causing vibrations that result in light variations, like in the Sun. Such oscillations have now been discovered by Victoria Antoci and collaborators using the NASA spacecraft Kepler, but in a much hotter star. The scientists publish this in the most recent issue of...

2011-08-26 07:12:15

  Imagine forecasting a hurricane in Miami weeks before the storm was even a swirl of clouds off the coast of Africa–or predicting a tornado in Kansas from the flutter of a butterfly's wing(1) in Texas. These are the kind of forecasts meteorologists can only dream about. Could the dream come true? A new study by Stanford researchers suggests that such forecasts may one day be possible–not on Earth, but on the sun. "We have learned to detect sunspots before they are...

2011-04-18 09:13:00

Researchers at the University of Central Lancashire have monitored the birth of a sunspot over a period of eight hours using observations from NASA's Solar Dynamics Observatory (SDO). Dr Stephane Regnier will present the results at the RAS National Astronomy Meeting in Llandudno on Monday 18th April. The emerging sunspot was first detectable at 17:00 UT on 30th May 2010 in SDO magnetograms, which map the magnetic intensity of the solar disc. The first signs were small patches of strong...

2011-01-08 08:15:00

To prevent solar damage to communication, navigation and other high tech systems, scientists are determining the temperatures, composition and movement of materials inside the sunSunspots are huge, dark, irregularly shaped--and yet, temporary--areas of intense magnetism on the sun that expand and contract as they move."The diameters of sunspots are frequently on the order of 50,000 miles," said Frank Hill of the National Science Foundation's (NSF) National Solar Observatory. "By contrast, the...

2010-10-01 09:10:00

The sun is a very noisy place, generating an inferred multi-frequency song comparable to cathedral bells To most of us, the sun seems to dangle in space silently without making so much as a peep. Nevertheless, "the sun is a very noisy place," said Scott McIntosh of the National Science Foundation (NSF)-supported National Center for Atmospheric Research. What does the sun sound like? As best as we can tell, the sun sounds like a low hum punctuated by frequent rhythmic, bass-y thumps. How does...

Word of the Day
  • A large punch-bowl of the eighteenth century, usually of silver and with a movable rim, and decorated with flutings and a scalloped edge. It was also used for cooling and carrying wine-glasses.
  • A kind of cotton handkerchief having white spots on a colored ground, the spots being produced by a chemical which discharges the color.
This word is possibly named after Monteith (Monteigh), 'an eccentric 17th-century Scotsman who wore a cloak scalloped at the hem.'