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solar power

Our moon would be a planet under new definition of planethood

Space

Our moon would be a planet under new definition of planethood

When astronomers last redefined "planet", Pluto was demoted to being a dwarf. A proposed revision to the criteria would instead grant planethood to the moon

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Origin of Earth's water traced back to the birth of our planet

Earth

Origin of Earth's water traced back to the birth of our planet

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Most distant solar system object yet could hint at hidden planet

Space

Most distant solar system object yet could hint at hidden planet

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Pluto surprises with ice volcanoes and alien weather

Space

Pluto surprises with ice volcanoes and alien weather

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NASA debates where to land on Mars – but are we ready to go?

Life

NASA debates where to land on Mars – but are we ready to go?

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Salt flats on Europa mean moon's ocean may come to surface

Space

Salt flats on Europa mean moon's ocean may come to surface

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Rosetta's comet has oxygen made before the solar system's birth

Space

Rosetta's comet has oxygen made before the solar system's birth

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Russia starts moon base collaboration with European Space Agency

Space

Russia starts moon base collaboration with European Space Agency

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Saturn's ice moon Enceladus revealed in unprecedented detail

Life

Saturn's ice moon Enceladus revealed in unprecedented detail

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Icy plains and snakeskin terrain among Pluto's lingering puzzles

Space

Icy plains and snakeskin terrain among Pluto's lingering puzzles

The team behind NASA's New Horizons probe has just released their first official paper on Pluto's geology, atmosphere and moons – but big mysteries remain

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Space

China has had a telescope on the moon for the past two years

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Space

Lake once filled the crater on Mars where Curiosity rover sits

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Space

New Horizons shows Pluto sporting blue skies and red water ice

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Space

Craters and canyons hint at violent past of Pluto's moon Charon

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