Secrets of the asteroid belt: Vesta actually more like a planet New images of the asteroid Vesta captured by NASA’s Dawn spacecraft indicate it’s more like a planet than a dead rock. Different rocks and minerals on the surface of Vesta Different rocks and minerals on the surface of Vesta. Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA Vesta is a unique asteroid because of the wide variety …
That's half the issue here - going from meteorite to rocky planet, there's very little difference other than "size" (and for gas giants, it's just the fact they're massive enough to hold onto Hydrogen/Helium/Volatiles).
Size does determine whether or not you can differentiate into a distinct structure (Core/Mantle/Crust) or are just a pile of assorted rubble. The thing is we don't quite know at what size that happens - hence why Vesta being less rubble-y and more structure-y is a bit of a surprise!
"Or to put it another way, to find out why one of these bodies become an asteroid and the other a dwarf planet?"
Given size is about the only thing that separates Vesta and Ceres (Ceres *is* still an asteroid, just a bloody big one), then it's of no great surprise. It would be stranger if all planets were of uniform size.
The only reason Vesta is an "asteroid" and Ceres is a "dwarf planet" is because we bloody defined them as such.
...was an anti-piracy advert. Unskippable
Then came several un-skippable previews for other solar systems soon to be released.
Then more anti-piracy adverts, also unskippable.
Then a bunch of pointless distributor-sig animations.
Then a menu.
And another couple of pointless distributor-sig animations.
And then there was the solar system.
And it was round.
The terms are purely arbitrary. A moon is simply a smaller body in orbit around a larger body. A planet is a bit of rock or gas which happens to be of a certain size and roughly spherical. A dwarf planet is just less so. Planets may have or have not undergone heating at some stage resulting in various elements separating out.
If the earths moon append to have its own orbit around the sun say between Earth and Mars would it be classed as a planet or dwarf planet? Its only slightly smaller than Mercury.
Mines the one with Sky at Night - the Rebellion in the pocket.
had a picture exactly like that of Earth which proved we lived on a doughnut and proved, (in the light of which), subsequent narratives by Ralph Fiennes of his journeys were rubbish.
Mines the one with the chocolate covered bagel fried by the bakery below the Finchley tax office in the early nineties.
Yes, it's good to learn more but...
Are we any closer to moving the asteroids about? Probably not Vesta 'cos it's too far away and not Ceres on a first try 'cos it's too big but there are metal-rich rocks not too far away from Earth.
How do we go about moving them into Earth orbit, hopefully before the end of this century, where we can chew them up for lots of yummy resources.
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