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Les Cercles

@lescercles / lescercles.tumblr.com

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Julio Le Parc, Double-Mirror, 1966 Julio le Parc, exhib., New York, Howard Wise Gallery, nd

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NASA’s James Webb Space Telescope has observed the well-known Ring Nebula in unprecedented detail. Formed by a star throwing off its outer layers as it runs out of fuel, the Ring Nebula is an archetypal planetary nebula. This new image from Webb’s NIRCam (Near-Infrared Camera) shows intricate details of the filament structure of the inner ring. There are some 20,000 dense globules in the nebula, which are rich in molecular hydrogen. In contrast, the inner region shows very hot gas. The main shell contains a thin ring of enhanced emission from carbon-based molecules known as polycyclic aromatic hydrocarbons (PAHs). 

Credit: ESA/Webb, NASA, CSA, M. Barlow (University College London), N. Cox (ACRI-ST), R. Wesson (Cardiff University)

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The Sputnik Planitia is a 1 000 km (621.4 miles) wide basin situated in the heart-shaped region of the Pluto's surface. Its current location seems to have resulted from the accumulation of frozen nitrogen ice, which caused the planet to change its spin, in the so-called polar wander process and created cracks and tension in the crust.

Credit: NASA

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Solar corona and prominences. May 28, 1900. Annual report of the Board of Regents of the Smithsonian Institution. 1942.

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