Meteorite is 4.6 billion years old and still rocking the solar system dating scene At 4.6 billion years old, meteorite Erg Chech 002 is among the oldest found on Earth. A new analysis of its composition promises to help understanding of the early solar system and date other space rocks. A research team led by Evgenii Krestianinov, a PhD candidate at the Australian National University, has found that the …
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When I see Social Media and Politicians talking about our world I think we're just crap, but the Science views of everything make me so much more confident in humanity and science's view of the history of the Universe. As a little child I heard the BBC report that Albert Einstein had died and the description of his life started me looking at science. It was difficult initially which resulted in my mother getting the local library to give me an Adult ticket so that I could start reading lots of scientific work, something I've done ever since - thanks to my mother.
This article is fascinating when you think about the creation of the Earth and all the events that have happened ever since - talking about meteorites striking our planet might make people a little scared but the result of so many meteorite deliveries since the planet first existed has resulted in our life's creation and evolution - our world's history is wonderful!
I'm not sure I've fully grasped it but checking with Wikipedia it seems that Al26/Mg ratios give a date for the meteorite falling to Earth. Al26 is produced by action of cosmic rays on Si while it's in space. That process stops when it lands so the ratio of Al26:Mg tells you how long it's been sitting there on the Earth's surface. One of the awkward bits here is that it Al26 will have been decaying to Mg while it was in orbit. I suppose the lead dating must be the key to working out how much of the Mg would have been present when it fell.
But the paper then says there's too high a ratio of Al26:Al27. This is the what seems odd to me. I take it the Al27 is s component of the cosmic dust from which the meteorite was formed while the Al26 is generated subsequent to the meteorite's formation. As they have different mechanisms by which they arrive in the meteorite's contents why should there be a prior expectation of any particular ratio?
I think I must be missing something here but what is it?
Who had that winning ticket in the 'this is how was the universe created' sweepstake? The ancient aliens/Gods hailing from 4.6 billion years ago were using technology akin to early 21st century notebook computers from the planet Earth; the meteorite a remnant from the planet where they stored and recycled all their redundant IT.
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