Today we got more on the Polana CI-chrondrites, here Ryugu. We should be able to replicate the results with Bennu.
Before Polana birthed the rubble of Ryugu - they say - it was under a magnetic field. This was 15 microtesla (μT); Earth to contrast is 50 μT. That would have worked on the iron and nickel in these icy mudballs - and on the gas and ice giants out there.
"Out There" would be from 7 AU on. Closer home, the solar system - then - was pulling more like our 50 μT even up to 200. Jupiter, remember, had a Grand Tack at some point, so - implicitly - formed Out There.
This is evidence Ceres and Hygeia and those other iceballs formed even further Out There.
No comments:
Post a Comment