Which is the eldest?

First of all, the Big Bang is the beginning of the Universe.

The Universe is about 13-15 billion years old.

Matter started quickly to collect in clumps due to gravitation. The clumps evolved into galaxies and into stars.

That happened about 10 billion years ago.

The sun formed later, about 5 billion years ago, also from a dust cloud. Not all matter ended up in the sun, some of it stayed in a disk.

Here the story repeats: again due to gravity clumps of matter formed in the disk. Slowly the clumps collected almost all matter in the disk and formed the planets.

Which planet formed first? The answer is: give or take a few million years they all formed at the same time between 4.5 and 4.8 billion years ago.

You misunderstand the timing of these things. THe Big Bang was about 13.7 billion years ago. The basic materials of the universe were formed at that time, but many things happened between then and when our solar system was formed. For example, there was a whole generation of stars that went through a complete life cycle before the sun even started up. It was in the stars from this first generation that the heavier elements (like carbon, silicon, and iron) were formed.

Our sun and the planets formed about 5 billion years ago and condensed out of a mass of gas and dust. Gravity was the main force that brought it together. There may have been a supernova near by to help the process, but this has not been confirmed. All the planets in our system formed at about the same time.

The formation of the planets is its own theory, quite separate and distince from either reletivity and the big bang. In fact you don't need either theory to explain planetary formation. Under current models all the planets formed our of debris left over form the fomration of the sun, and tended to form at about the same time.

I would think the theory of relativity. Big Bang, makes me wonder about all planets being formed or just this planet. Hmmmmm? Good question.

Hehe after reading your question and some of the answers..

God created the heavens and the earth.

He created them in different stages of development with respect to each other. (which would fit what we call the theory of relativity, or the big bang theory)

And based on what God created, Jupiter is the one in the most advanced stage of development, so it could be considered the "oldest". =)

I really don't believe that planets were formed from "big bangs", if not, where are there no now "big bangs" forming more planets?

no one can really prove the big bang theory - how could they ever say what order they were formed in?

I believe God created all the universe - don't u think such magnificence was made by a greater being than an explosion?

It depends when some stars are born. For example, if our star [the sun] would be the first star to be born in the universe, we will also be the first planets.

i dont think planets were formed from big band....planets were formed from sun spilling out mass.

first the sun is formed then the planets in planets mecury is first.