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Explore Arecibo Radar, Radar Echoes, and more!

Dark matter map begins to reveal the universe's early history - Figure 1: A 14 arc minute by 9.5 arc minute section of a Hyper Suprime-Cam image, with contour lines showing the dark matter distribution. A higher resolution images is available by clicking the image. An image with just the background galaxies is available here. There is also a scalable image available in color and black and white. Credit: NAOJ/HSC Project

NASA SDO: Images of a mid-level solar flare - NASA's Solar Dynamics Observatory captured this image of a mid-level solar flare on the sun - as seen in the bright spot in the lower center of the solar disk on Aug. 24, 2015. The image shows a subset of extreme ultraviolet light that highlights the extremely hot solar material, which is typically colorized in red. Credit: NASA/SDO