My son wants to know...which planet in our solar system formed first ?
Question:
Answer:
Actually, all of them simultaneously. Sun and the planets were all formed from the remnant gas cloud of the supernova explosion of a star much larger than Sun. While most of the gas cloud fell back to the center forming our Sun, the most dominant center of the materials in the peripheral volume ended up forming Jupiter, the largest planet.
Therefore when the solar system is in its nascent stage of formation, if you see which proto-planet has formed ahead of other planets, you may see Jupiter to be the first, but other planets have also started developing, depending on what's your yardstick of measurement for calling an object a planet.
Clearly 4-5 billion years ago, when the protoplanets were still under development, there were still numerous smaller size objects whirling around Sun and the gas cloud would still not have settled.
Philosophical debates aside, I don't think you can answer this question. I know of no scientific was to say which planet formed first, seeing as we barely are able to reach most of them.
Mmm well I think the sun formed first.
I do not know of any specific findings. My opinion is that Jupiter probably started forming first. Recent research suggests that in the early solar system, Jupiter probably drove a number of resonance events that forced the outer planets outward into their present orbits. It is also likely that gravitational interactions with the proto-Jupiter may have driven the Last Great Bombardment period that may have deposited vital resources onto the newly formed Earth II after the impact that formed the Moon.
pluto is no longer a planet, so my guess is mars. maybe. because it is small (compared to those gas giants), and cold out that far, and probably cooled faster than mercury (now considered the smallest) because it and venus is very close to that sun, and mars is smaller and farther, than earth. this is a guess.
There is no way to tell.
all the planets were forming in the same time. And then the natural satellites ( Moon )
Theoretically speaking, the last one. Froze faster!
Ciao...John-John.
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