Pluto, formal designation 134340 Pluto, is the second-largest known dwarf planet in the Solar System (after Eris) and the tenth-largest body observed directly orbiting the Sun. Classified as a planet from its 1930 discovery, in 2006 the International Astronomical Union (IAU) declared it a dwarf planet instead; Pluto is now considered the largest member of a distinct population called the Kuiper belt.

What Radioactive Plutonium Feels Like

American scientist Siegfried Hecker journeyed to North Korea, where he was able to hold a lump of plutonium.

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Hubble Spies the Faces of Pluto

Newly released Hubble Space Telescope photos show Pluto is changing color and its ice sheets are shifting.

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Pluto's dynamic surface revealed by Hubble images - BBC News

Washington Post

Pluto's dynamic surface revealed by Hubble images BBC News The icy dwarf planet Pluto undergoes dramatic seasonal changes, according to images from the Hubble Space Telescope. The pictures from Hubble revealed changes in the brightness and the colour of Pluto's surface. ... Pluto images show a dynamic worldLos Angeles Times New Pluto Pictures Unveiled; Hubble's Sharpest YetNational Geographic NASA Pluto mission only just beginningNetworkWorld.com Register -TG Daily -Scientific American all 389 news articles »

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