chondrule

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small granule (of e

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The chondrules in other meteorites give us a range of different ages," lead researcher Brandon Johnson, a planetary scientist at Brown University, said in a (https://www.
UPDATE: Chondrules are among the oldest pieces of planetary building blocks, formed roughly 4.
They derive their name from their main component -- chondrules, which formed as molten droplets floating in space.
The new discovery is that the so-called chondrules were formed during the first three million years of the solar system's development as well.
Members of the subclass of stony meteorites known as achondrites are completely devoid of chondrules.
Benton reveals a sequence of events that reflect a complex history: (1) chondrule formation and initial assembly; (2) brecciation; (3) thermal metamorphism and (4) shock veining.
Chondrules themselves formed through quick melting events in the dusty gas cloud -- the solar nebula -- that surrounded the young sun.
This technique enabled the researchers to study the orientation and position of individual micrometre-sized grain particles that had coalesced around the chondrule.
The Sun's powerful magnetically driven wind transported the beads into the outer solar system, where chondrules between a millimeter and a centimeter across rained down on the protoplanetary disk and combined with dust to form comets and asteroids.
This meteorite contains both chondrules and metal flaking and is an L4 type chondrite with a terrestrial age of between 15,000 and 20,000 years old.
We can now use the isotopes to measure the age of different chondrules, parts of meteorites, and understand far more about the early part of our Solar System," one of the scientists, Johan Villeneuve, told BBC News.
The overwhelming majority of chondrites contain spherical structures called chondrules (from the Greek word for "grain") and are thought to have formed around dust remnants from the primordial solar nebula that underwent heating and formed the earliest structures of our solar system.
Inclusions and chondrules formed independently of meteorites and were later incorporated into them.
The early family tree of our solar system's rocky planets features tiny glassy spheres called chondrules, found today inside ancient meteorites.
In the equivalent of nine pages, you get a fast-forward account of how the solar system came to be, and in the process you are introduced to such terms as refractory inclusions, chondrules, and devolatilized.