NASAのインスタグラム(nasa) - 9月26日 22時06分

Our Solar Dynamics Observatory spacecraft views our Sun in ten different wavelengths because each wavelength reveals different solar features. This view of the Sun, captured on Sept. 21, 2018, uses two images taken at virtually the same time but in different wavelengths of extreme ultraviolet light.
The red-tinted image, which captures material not far above the Sun's surface, is especially good for revealing details along the edge of the Sun, like the small prominence at the ten o'clock position.

The brown-tinted image clearly shows two large coronal holes (darker areas) as well as some faint magnetic field lines and hints of solar activity (lighter areas), neither of which are apparent in the red image. This activity is occurring somewhat higher in the Sun's corona. In a way it is like peeling away the layers of an onion, a little at a time.

Our missions to learn more about our closest star will help us understand where the Sun's energy comes from, how the inside of the Sun works, how energy is stored and released in the Sun's atmosphere and much more.
Credit: NASA/GSFC/Solar Dynamics Observatory

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