A layer of nickel of cosmic origin, which exists between 80 and 110 km high in Earth’s atmosphere, has been modeled for the first time, including dynamics and complex neutral and ion chemistry.
meteors & meteorites
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Tiny Fireballs May One Day Reveal Unseen Asteroids
The tiny fireball that flew over Japan in 2017 came from an asteroid that could threaten Earth in 10 million years or so. Scientists are trying to use these little meteors to hunt larger objects.
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Dust Older Than the Sun Sheds Light on Galactic History
A small pile of dust grains older than the Sun brings new evidence about the rate at which stars are born in the Milky Way.
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“Glass Pearls” in Clamshells Point to Ancient Meteor Impact
Research suggests that the spherical structures, smaller than grains of sand, may be microtektites, but additional investigations are needed to verify their identity.
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Goldilocks Meteors Carved into Cones
Their “just right” shape lends some shooting stars flight stability and symmetry.
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Fireballs Could Provide Clues to an Outstanding Meteor Mystery
Fireballs in the summer sky may signify a chance to probe their mysterious origin.
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Oldest Meteorite Collection Found in World’s Oldest Desert
Rare 2-million-year record reveals the meteorite flux rate.
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Meteorite’s Hidden Treasure: A Comet
A fragment of a comet found hidden inside a meteorite is offering new insights into the dynamics of our young solar system.
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Fireball over the Bering Sea
Powerful meteorite explodes over “a sensitive part of the world.”
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Apollo May Have Found an Earth Meteorite on the Moon
The meteorite may have been blasted off of Earth during an impact, mixed with lunar rocks, and brought back to Earth 4 billion years later by astronauts.