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offmind
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Viestejä17175

Oumuamua on ehkä hieman huono esimerkki asteroiditörmäyksen uhasta, koska siihen liittyy niin paljon outoa. Uusimman oletuksen mukaan, se olisikin erittäin harvaa höttöä oleva tähtienvälinen lumihiutale.

https://www.syfy.com/syfywire/no-oumuamua-is-not-an-alien-spaceship-it-m... .

https://arxiv.org/pdf/1902.04100.pdf .

COULD 1I/’OUMUAMUA BE AN ICY FRACTAL AGGREGATE EJECTED FROM A PROTOPLANETARYDISK? A FLUFFY RADIATION-PRESSURE-DRIVEN SCENARIO

...Here  we  assess  whether  theinternal  structure  of  1I/’Oumuamua,  rather  than  its  geometry,  could  support  a  radiation-pressuredriven scenario.  We adopt a mass fractal structure and find that the type of aggregate that could yield the required area-to-mass ratio would have to be extraordinarily porous with a density∼10−5gcm−3. Such porous aggregates can naturally arise from the collisional grow of icy dust particles beyond the snowline of a protoplanetary disk and here we propose that 1I/’Oumuamua might belong to this population...

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