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Two more Lunar Prospector, which will scan the moon from a low orbit, and Stardust, which will taste a comet's tail have been approved.
ECONOMIST: Nice picture. Where to next?
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What's the view like from inside a nebula, or a comet's tail?
ENGADGET: Initial projects from 3net Studios include the world's first native 4K TV show
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His figures were roughly a centimetre tall, most made with two deliberate strokes of the brush, and allowed to fade away as his paint ran out, like the trailing tail of a comet.
ECONOMIST: Roman Opalka
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"When they come close to the Sun, this ice melts - solar wind blows this material out into space, so you get a tail of matter coming off the comet, " explains O'Brien.
BBC: Star of Bethlehem: The astronomical explanations