NASA STEREO reveals the Entire Sun
بسم الله الرحمن الرحيم
Launched in October 2006, STEREO
traces the flow of energy and matter from the sun to Earth. It also provides
unique and revolutionary views of the sun-Earth system. STEREO, when paired
with SDO, can now give us the first complete view of the sun's entire surface
and atmosphere. Read more at:
This is a big moment in solar physics," says
Vourlidas. "STEREO has revealed the sun as it really is--a sphere of hot
plasma and intricately woven magnetic fields."
Each STEREO probe photographs half of the star and beams
the images to Earth. Researchers combine the two views to create a sphere.
These aren't just regular pictures, however. STEREO's telescopes are tuned to
four wavelengths of extreme ultraviolet radiation selected to trace key aspects
of solar activity such as flares, tsunamis and magnetic filaments. Nothing
escapes their attention.
. "With data like these, we can fly around the sun
to see what's happening over the horizon—without ever leaving our desks,"
says STEREO program scientist Lika Guhathakurta at NASA headquarters. "I
expect great advances in theoretical solar physics and space weather
forecasting."
Consider the following: In the past, an active sunspot
could emerge on the far side of the sun completely hidden from Earth. Then, the
sun's rotation could turn that region toward our planet, spitting flares and
clouds of plasma, with little warning.
"Not anymore," says Bill Murtagh, a senior forecaster
at NOAA's Space Weather
Prediction Center
in Boulder, Colorado. "Farside active regions can
no longer take us by surprise. Thanks to STEREO, we know they're coming."
NOAA is already using 3D STEREO models of CMEs
(billion-ton clouds of plasma ejected by the sun) to improve space weather
forecasts for airlines, power companies, satellite operators, and other
customers. The full sun view should improve those forecasts even more.
للاخوه العرب انا مترجم الكلام مع ملف الفيديو
اضغط هنا لتحميل مقطع فيديو يشرح ذلك مع الترجمه فى ملف ورد 
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