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Scientists Help NASA 'Follow The Sun' -- In Stereo

Date:
October 22, 2006
Source:
University of Minnesota
Summary:
The University of Minnesota-designed and built instruments aboard the twin spacecraft of NASA's STEREO mission -- currently scheduled for launch October 25 from Cape Canaveral, Florida -- will detect waves of energy and charged particles emitted by the sun via processes that may help cause coronal mass ejections, or CMEs.

Artist's concept showing a coronal mass ejection (CME) sweeping past STEREO.
Credit: Image credit: NASA

Like geologists poring over seismograph records to identify the telltale signature of an imminent earthquake, University of Minnesota researchers are poised to probe the sun for a tipoff that a huge eruption of its corona is brewing. Called coronal mass ejections, or CMEs, these solar castoffs can wreak havoc with satellites, whole nations' power grids and the well-being of astronauts. The university-designed and built instruments aboard the twin spacecraft of NASA's STEREO mission--currently scheduled for launch Oct. 25 from Cape Canaveral, Fla.--will detect waves of energy and charged particles emitted by the sun via processes that may help cause CMEs.

"As our society becomes more electronic and sophisticated, these outbursts become more disruptive," said Paul Kellogg, a retired physics professor who is part of the university's space physics team. "STEREO will allow us to see when one is coming to Earth."

The $400 million STEREO mission is the first to use the moon's gravity to "slingshot" more than one spacecraft into orbit. As the two spacecraft circle the moon, the moon will first throw one into orbit trailing Earth and then, a month later, hurl the second into orbit moving ahead of Earth. As the distance between the spacecraft widens, they will gain a stereoscopic perspective on the sun that will allow cameras and other instruments aboard to detect the direction in which any CMEs are traveling.

The University of Minnesota team has worked closely with researchers at the Paris Observatory to design and build instruments for their joint experiment, called S/WAVES (short for STEREO WAVES). The university's instruments will be able to track the shock wave that precedes a CME as it moves through space.

"It's all to understand and predict how the sun works," said university physicist Keith Goetz, the project manager for S/WAVES. "We hope to get moving pictures of CMEs and solar flares. We want to be able to look at the surface of the sun and say, for example, 'There's going to be an eruption-right there, in that spot.'"

It will be the first of the experiments aboard STEREO to be turned on following launch.


Story Source:

The above story is based on materials provided by University of Minnesota. Note: Materials may be edited for content and length.


Cite This Page:

University of Minnesota. "Scientists Help NASA 'Follow The Sun' -- In Stereo." ScienceDaily. ScienceDaily, 22 October 2006. <www.sciencedaily.com/releases/2006/10/061018150446.htm>.
University of Minnesota. (2006, October 22). Scientists Help NASA 'Follow The Sun' -- In Stereo. ScienceDaily. Retrieved September 17, 2014 from www.sciencedaily.com/releases/2006/10/061018150446.htm
University of Minnesota. "Scientists Help NASA 'Follow The Sun' -- In Stereo." ScienceDaily. www.sciencedaily.com/releases/2006/10/061018150446.htm (accessed September 17, 2014).

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