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    sun's corona tagged posts

    Magnetic Field Maps of the Sun’s Corona

    September 14, 2024, Categories  Astronomy/Space

    A purple and yellow image shows flares coming off the side of the sun and looping back. An inset shows the actual data of the coronal map in black and white
    The NSF Daniel K. Inouye Solar Telescope presents its first map of the solar coronal magnetic field signals as measured using the Zeeman Effect. The Zeeman Effect polarizes the coronal emission, which requires the advancements of the Inouye Solar Telescope to measure as its signals are only a few parts per billion of the Sun’s surface brightness. The background image identifies the region observed in detail by Inouye as imaged by NASA’s Solar Dynamics Observatory in ultraviolet light. Credit: NSF/NSO/AURA

    The U.S. National Science Foundation (NSF) Daniel K...

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    How 1,000 Undergraduates helped Solve an Enduring Mystery about the Sun

    May 12, 2023, Categories  Astronomy/Space

    For a new study, a team of physicists recruited roughly 1,000 undergraduate students at the University of Colorado Boulder to help answer one of the most enduring questions about the sun: How does the star’s outermost atmosphere, or “corona,” get so hot?

    The research represents a nearly-unprecedented feat of data analysis: From 2020 to 2022, the small army of mostly first- and second-year students examined the physics of more than 600 real solar flares—gigantic eruptions of energy from the sun’s roiling corona.

    The researchers, including 995 undergraduate and graduate students, published their finding in The Astrophysical Journal. The results suggest that solar flares may not be responsible for superheating the sun’s corona, as a popular theory in astrophysics suggests.

    “We...

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