Image: Northern lights over Canada

Just hours after the winter solstice, a mass of energetic particles from the Sun smashed into the magnetic field around Earth. The strong solar wind stream stirred up a display of northern lights over northern Canada.

Mars rover Opportunity busy through depth of winter

NASA's senior Mars rover, Opportunity, worked through the lowest-solar-energy days of the mission's seventh Martian winter, while using a diamond-toothed rock grinder and other tools in recent weeks to investigate clues about ...

Saturn's moon Atlas shines between gas giant's rings

See that small pixel? That's an entire moon you're looking at! Peeking between the rings of Saturn is the tiny saucer-shaped moon Atlas, as viewed from the Cassini spacecraft. The image is pretty, but there's also a scientific ...

Mexico: Mayan ball court was celestial 'marker' (Update)

Mexican archaeologists say they have determined that the ancient Mayas built watchtower-style structures atop the ceremonial ball court at the temples of Chichen Itza to observe the equinoxes and solstices, and they said ...

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