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Asteroid Day Brief Apr 04

4 Apr 2018, 04:59 UTC
Asteroid Day Brief Apr 04
(200 words excerpt, click title or image to see full post)

How analyzing meteorites led us to learn about the evolution of Jupiter in the early solar system ?
When scientists analyzed over 32 different types of meteorites found on Earth, they realized they could be categorized in two distinct reservoirs: the carbonaceous chondrites and the non-carbonaceous chondrites.
The meteoriticist Paul Warren, looked into measurements of chromium and titanium isotopes in these two types of meteorites. He expected a continuum of isotopic abundance because he was under the assumption that both meteorites had formed in the same region of the asteroid belt. In fact, he found that in the carbonaceous chondrites, the isotopes level were starkly different than in non-carbonaceous chondrites. The first plausible explanation for this phenomenon is that they could have been separated at formation, millions of years apart. However, this theory contradicts what we know about the carbonaceous chondrites, that is, they are younger than other meteorites. According to Dr. William Bottke, director of the Department for Space Studies at the Southwest Research Institute, Colorado US, other theories suggest the CC formed in the asteroid belt. “This could still be true,” he mentioned, when asked about the presence of these asteroids in the asteroid belt, “but then it ...

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