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Solar System Research Paper

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The solar system started out as a cloud of gas and dust. Now, it is full of planets, moons, asteroids and comets. They began forming more than 4 billion years ago.

This week, scientists published a new study about the solar system. It says that Jupiter is the oldest planet.

Jupiter formed less than a million years after the solar system began. A million years seems like a long time. However, this was still very early. If the entire history of the solar system was squished into one year, Jupiter would have formed in less than two hours.

Jupiter's core formed first. Then, Jupiter gathered up gas and dust. The planet grew to be 50 times the size of Earth.

Thomas Kruijer is scientist in California. He helped write the study about Jupiter. The …show more content…

On one side were the inner rocks. They were between Jupiter and the sun. On the other side were the outer rocks. They were between Jupiter and the outer edge of the solar system.

Today, those rocks are jumbled together in a single belt. It is between Jupiter and Mars. Rocks from this belt sometimes land on Earth. Then, scientists like Kruijer can study them.

Rocks from the two groups look exactly the same. However, the chemicals inside them are different.

Space Rocks In Different Places

Scientists have special tools. They can see the chemicals inside the rocks. The chemicals tell the scientists how old the rocks are. The chemicals also tell scientists which group the rock belonged to, Kruijer said.

The rocks separated around 1 million years after the solar system formed. Then, they came back together a few million years later.

Scientists believe that they came back together because Jupiter grew. The giant planet moved closer to the sun.

Kruijer saw rocks that were the same age. They looked the same. The chemicals inside them were different, though. This means that the rocks must have been in different locations, he said.

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