(PhysOrg.com) -- "Terra firma." It's Latin for "solid Earth." Most of the time, at least from our perspective here on the ground, Earth seems to be just that: solid. Yet the Earth beneath our feet is actually in constant ...
Earth Sciences
Dec 28, 2009
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Three times further away from the sun than the Earth lies an enormous lump of metal. Around 252km in diameter, the metallic "M-class" asteroid 16 Psyche is the target of NASA's next mission to the belt of giant rocks that ...
Space Exploration
Dec 4, 2017
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When the Apollo astronauts returned to Earth, they came bearing 380.96 kilograms (839.87 lb) of moon rocks. From the study of these samples, scientists learned a great deal about the moon's composition, as well as its history ...
Space Exploration
Apr 17, 2017
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Researchers in Japan say they may be one step closer to solving a mystery at the core of the Earth. It has long been established that approximately 85 percent of the Earth's core is made of iron, while nickel makes up an ...
Earth Sciences
Feb 1, 2017
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During accretion and differentiation of the Earth, chemical interactions in a silicate magma ocean and liquid iron drove silicon and oxygen impurities into what went on to become the liquid outer core. Contrasting with previous ...
Earth Sciences
Jan 29, 2013
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At the center of Earth is a vast ball of metal, the planet's core. While unreachable without the help of Jules Verne, it can be studied and plays a vital role for the world.
Earth Sciences
Aug 9, 2023
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