Asteroidal Ignace Rocks, Scientist, Thirty Million Years discussed on NASACast Audio

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Maximize what you can find about learning more about our solar system and about life in the universe well i mean that that's kind of a a difficult question for a scientist answer because you know truth be told were all paid to pursue our hobbies and so we all have our own hobbyhorses say it as i as i mentioned um you know my particular interest sarin ignace processes i mean you know when the earth moon mars asteroids i i like uh uh magnetic rocks and you know i couldn't tell you why just the way i am uh on so one of the things one of the things it's very curious about asteroidal ignace rocks is that asteroids were melted very early in the solar system probably within a couple million years of the formation of the earliest known solids in the solar system so something had to heat up relatively small objects may be a few hundred dick kilometers neil two hundred miles in diam earn radius something like that to the point where they were melted and then cooled down and then they comply lately shut off after that so was a very very intense heat source said acted early died out and then never came back now we think we know what what caused this um but there are a you know in the so the um uh the leading contenders radioactive heating by a very short live isotope of aluminum it has a halflife of about seven hundred and thirty million years and so and aluminum is a is a major element.

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