Scientists Used NASA Data to Predict the Eclipse Corona | NASA

Scientists Used NASA Data to Predict the Eclipse Corona | NASA

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Due to NASA’s STEREO-A’s position behind the Sun and the particular rotation rates of the Sun and Earth, STEREO-A’s view of the corona on Aug. 12, 2017, was virtually the same those within the path of totality would see nine days later on Aug. 21. Click and drag the slider to compare STEREO-A’s eclipse prediction (left) to observations from ESA/NASA’s SOHO (right) — which was positioned to share Earth’s view of the corona — the day of the total eclipse.

Credits: NASA/ESA/Goddard/STEREO/SOHO/Joy Ng