ADVERTISEMENT
  About the SA Blog Network













Observations

Observations


Opinion, arguments & analyses from the editors of Scientific American
Observations HomeAboutContact

NASA’s Solar Dynamics Observatory producing sun science that doubles as eye candy

The views expressed are those of the author and are not necessarily those of Scientific American.


Email   PrintPrint



SDO first lightA new sun-studying satellite had its coming-out party Wednesday, when scientists involved in the project presented early imagery and videos from the spacecraft’s instruments at a news conference at the Newseum in Washington, D.C. The Solar Dynamics Observatory, or SDO, launched by NASA in February, gathers a voluminous stream of data about the star nearest Earth, observations that should help heliophysicists better understand the workings of the sun and improve forecasts of solar activity that can cause problems on Earth.

"We are all living in the atmosphere of a star, and that’s our sun," explained Richard Fisher, director of NASA’s heliophysics division. That atmosphere can be a bit turbulent—streams of charged particles and blasts of radiation can disrupt satellites and pose health hazards to astronauts in orbit. Stanford University’s Philip Scherrer, principal investigator for SDO’s Helioseismic and Magnetic Imager, noted that large solar storms can even knock out power grids on Earth.

Fisher said that SDO could do for heliophysics what the Hubble Space Telescope has done for astrophysics in general. A suite of instruments on SDO returns 16-megapixel images of the sun on a nearly continuous basis, splits the sun’s emissions into its individual wavelengths, tracks the propagation of waves across the sun’s surface and maps the ever-shifting solar magnetic field. With all that information, scientists can not only observe solar flares and other activity in stunning detail (see the video below for SDO’s view of a looping solar prominence; more images and videos are available from NASA’s Web site) but also get a glimpse of the interior workings of the sun that give rise to such events.

Much of that data—especially the videos of solar flares and other explosive outbursts—are pretty visually arresting, a fact that appears not to be lost on SDO’s operators. At the Newseum event, NASA astrophysicist Madhulika Guhathakurta said that an app was in the works to bring SDO images and movies to Apple’s iPad.

Image credit: NASA/SDO

 

Tags:





Rights & Permissions

Comments 5 Comments

Add Comment
  1. 1. Stefen 6:28 pm 04/21/2010

    What is the real elapsed time of the flare in the above video?

    Link to this
  2. 2. jtdwyer 7:16 pm 04/21/2010

    As we approach a Solar maximum, currently predicted to occur in May 2013 and expected to be a weak event, it’s important to collect better information.

    The Solar cycle predictions are not very reliable and we are far, far more dependent on satellites and remote power transmission facilities than ever before.

    Link to this
  3. 3. abyssalmystery 8:46 pm 04/21/2010

    The NASA web site says 4 sec. but that does not seem possible.

    Link to this
  4. 4. dbtinc 8:47 am 04/22/2010

    NASA proves to be useful in this type of mission. Please, drop the manned exploration …

    Link to this
  5. 5. chacha 4:10 am 05/3/2010

    what wil happened next for that information about the sun? is danger comming on earth?

    Link to this

Add a Comment
You must sign in or register as a ScientificAmerican.com member to submit a comment.

More from Scientific American

Scientific American Special Universe

Get the latest Special Collector's edition

Secrets of the Universe: Past, Present, Future

Order Now >

X

Email this Article

X