According to a new study published today in the Proceedings of the National Academy of Sciences, 40 years of reduced mercury use, emissions, and loading in the Great Lakes region have largely not produced equivalent declines ...
Environment
Nov 4, 2019
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281
How do you explore the interior of a planet without ever touching down on it? Start by watching the way the planet spins, then measure how your spacecraft orbits it—very, very carefully. This is exactly what NASA planetary ...
Space Exploration
Apr 17, 2019
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505
Mercury is small, fast and close to the sun, making the rocky world challenging to visit. Only one probe has ever orbited the planet and collected enough data to tell scientists about the chemistry and landscape of Mercury's ...
Space Exploration
Apr 27, 2018
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241
The scorching hot surface of Mercury seems like an unlikely place to find ice, but research over the past three decades has suggested that water is frozen on the first rock from the sun, hidden away on crater floors that ...
Space Exploration
Sep 19, 2017
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142
Around 4.6 billion years ago, the Solar System was a chaos of collapsing gas and spinning debris. Small particles of gas and dust clumped together into larger and more massive meteoroids that in turn smashed together to form ...
Space Exploration
Jun 27, 2016
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505
Scientists have long been puzzled about what makes Mercury's surface so dark. The innermost planet reflects much less sunlight than the Moon, a body on which surface darkness is controlled by the abundance of iron-rich minerals. ...
Space Exploration
Mar 7, 2016
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897
New data from MESSENGER, the spacecraft that orbited Mercury for four years before crashing into the planet a week ago, reveals Mercury's magnetic field is almost four billion years old. The discovery helps scientists piece ...
Space Exploration
May 7, 2015
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1025
A team of scientists has a new explanation for the planet Mercury's dark, barely reflective surface. In a paper published in Nature Geoscience, the researchers suggest that a steady dusting of carbon from passing comets has ...
Space Exploration
Mar 30, 2015
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524
(Phys.org) —A pair of researchers with Arizona State University has created computer simulations that show that Mercury may have a relatively large metal core because it was the victim of a hit-and-run collision with another ...
New evidence gathered by NASA's MESSENGER spacecraft at Mercury indicates the planet closest to the sun has shrunk up to 7 kilometers in radius over the past 4 billion years, much more than earlier estimates.
Space Exploration
Mar 16, 2014
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