The oldest planet of the solar system is Jupiter

An international team of researchers was able to prove that Jupiter is the oldest planet in our planetary system.

Analyzing the isotopes of tungsten and molybdenum, which are part of the substance of iron meteorites, a team of scientists in a new paper found that the material of meteorites is represented by two distinctly different species associated with two different parts of the solar nebula, which initially co-existed, but were then separated between 1 million And 3-4 million years after the formation of the solar system.

“The most likely mechanism for this effective separation is the formation of Jupiter, which cut a gap in the disk and prevented the exchange of material between these two gas tanks, or parts of the solar nebula,” said Thomas Kruijer, the main author of the new work. “Jupiter is the most ancient planet in the solar system, and its solid core was formed long before the scattering of the solar nebula gas, which is consistent with the model for the formation of giant planets, called the nuclear accretion model.”

Jupiter is the most massive planet in the solar system, and its presence has a very great influence on the dynamics of the solar accretion disk. Knowing the age of Jupiter is the key to understanding how the solar system evolved, gradually changing into the structure that it represents at the present time. Although the models predicted that Jupiter had formed relatively early, but to date its age was not exactly dated.

The team showed in their work on the basis of an analysis of the isotopic composition of matter in meteorites that the solid core of Jupiter was formed no more than 1 million years after the formation of the solar system, which makes it the most ancient planet in the solar system.

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