Because of this, some scientists refer to Vesta as a protoplanet.
2.
There is also no exact dividing line between a planetesimal and protoplanet.
3.
It is likely a remnant protoplanet.
4.
The protoplanet 4 Vesta is said to have a differentiated interior-mantle and iron core.
5.
According to the giant impact hypothesis the Moon formed from a colossal impact of a hypothetical protoplanet called Solar System's history.
6.
In February 2013 astronomers made the first direct observation of a protoplanet forming in a disk of gas and dust around a distant star.
7.
If Theia had been a separate protoplanet, it probably would have had a different oxygen isotopic signature from Earth, as would the ejected mixed material.
8.
If an eroded gas giant, the sun would have boiled the planet from a larger protoplanet, of 20 Earth masses up to half Jupiter's mass.
9.
In 1944 the German chemist and physicist Arnold Eucken considered the thermodynamics of Earth condensing and raining-out within a giant protoplanet at pressures of 100 1000 atm.
10.
The Earth's moon likely formed after a Mars-sized protoplanet obliquely impacted the proto-Earth ~ 30 million years after the formation of the Solar System.
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