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Space

Why the lack of water on Mars is so mysterious

An accounting of all the water that should have been and gone on Mars’s surface has come up with a discrepancy that shows just how little we understand the Red Planet’s hydrological history

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Space

Earth may have formed from two separate rings around the sun

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Space

How to see six planets in the sky at once in rare celestial alignment

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Space

Weird inside-out planet system may have formed one world at a time

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composite picture of Mars

Space

Mars's gravity may help control Earth’s cycle of ice ages

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Artist's impression of a free-floating-planet

Space

Rare Saturn-sized rogue planet is first to have its mass measured

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This is a false-color composite image of the Fomalhaut System taken with the Hubble telescope's Space Telescope Imaging Spectrograph (STIS) instrument in 2010 and 2012. The black circle at the center of the image blocks out the light from the bright star, allowing reflected light from the belt and planet to be photographed.

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Two asteroids crashed around a nearby star, solving a cosmic mystery

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artist's concept of what exoplanet PSR J2322-2650b may look like

Space

Strange lemon-shaped exoplanet defies the rules of planet formation

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Rogue planet gains 6 billion tonnes per second in record growth spurt

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Ceres may have been habitable at just half a billion years old

A billion or so years into its evolution, the icy dwarf planet Ceres may have had the right conditions to sustain life, which indicates the solar system may be more habitable than we thought

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6 of the most fascinating moments in the life of our solar system

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Space

A planet the size of Saturn could orbit the nearest sun-like star

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Space

Astronomers found a completely new type of plasma wave near Jupiter

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Meteorite causes rethink of how and when our solar system formed

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