Wednesday, February 9, 2011

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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عقار جديد يشفى من "فيروس سى" بدون أعراض جانبية.. وتداوله خلال عامين

بشرى لمرضى فيروس "سى" فى العالم على موعد مع أخبار سارة خلال العامين القادمين عندما يتم تداول عقار يقضى على مرضهم بنسبة ١٠٠...