Asteróides vieram de 5 planetas?

https://www.thetimes.co.uk/article/most-asteroids-come-from-only-five-ancient-planets-5t92g3g06

Citando:
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The vast majority of asteroids and meteorites are the shattered remains of five small planets that existed when the solar system was newly formed, astronomers have found.

These celestial bodies, which would have been comparable in size to moons, were broken up in a destruction derby of colliding rocks until all that survived were at least 400,000 much smaller lumps.

This model of the asteroids’ history should help scientists to predict when they are likely to pose a threat to the Earth.

In the inner asteroid belt are five large objects — Flora, Vesta, Nysa, Polana and Eulalia — each surrounded by an associated “family” of rocks that appear to have been chipped from its parent body billions of years ago."