We would expect the opposite: that as we go further from the sun’s primary energy source in its central ... Generally speaking, the reason stars shine is that gravity has pulled a sufficient ...

NASA images ... of the sun are Nuclear Spectroscopic Telescope Array (NuSTAR), X-ray Telescope (XRT) and Atmospheric Imaging Assembly (AIA). The image was produced using high-energy X-ray data ...

New images of the sun’s surface captured by a powerful ground-based solar telescope have revealed sunspots and other features in unprecedented detail. The eight images, released on May 19 ...