New lunar gravity maps point out a stark and unexpected difference between the sizes of ancient asteroids that slammed into the moon billions of years ago and the sizes of the rocky bodies that occupy the in the Main Asteroid Belt today.
Something is erasing craters on several moons of Saturn. What are the most likely causes?
An Arctic crater holds promise for figuring out how to spot something interesting on the moon or Mars, an astronaut says.
Strange bright swirls have long been known to exist on the moon's surface and their origin is steeped in mystery -- might comets be the culprit?
Two vast underground domes are buried under central Australia that researchers have realized are the scars of the biggest and most powerful asteroid impact yet found on Earth.
A previously undiscovered moon crater has been provisionally named after the famous US aviator Amelia Earhart.
Here today, gone tomorrow; a bright layer of frost lining a crater wall is vanquished by the springtime sun -- and seen by a NASA Mars satellite high overhead.
The MESSENGER mission is approaching the end of its operational life, but before it dies, you can help NASA name 5 of Mercury's craters.
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