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APOD

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

See Explanation. Clicking on the picture will download the highest resolution version available.

Fibrils Flower on the Sun

Explanation: When does the Sun look like a flower? In a specific color of red light emitted by hydrogen, as featured here , some regions of the solar chromosphere may resemble a rose . The color-inverted image was taken in 2014 October and shows active solar region 2177 . The petals dominating the frame are actually magnetically confined tubes of hot plasma called fibrils , some of which extend longer than the diameter of the Earth. In the central region many of these fibrils are seen end-on, while the surrounding regions are typically populated with curved fibrils. When seen over the Sun's edge, these huge plasma tubes are called spicules , and when they occur in passive regions they are termed mottles . Sunspot region 2177 survived for several more days before the complex and tumultuous magnetic field poking through the Sun's surface evolved yet again.

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Date February 17, 2015
Credit Image Credit & Copyright: Big Bear Solar Obs. , NJIT , Alan Friedman ( Averted Imagination )
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.