Jupiter Has Been Declared The Most Ancient Planet in The Solar System
Jupiter formed in a geological blink. Its rocky nucleus met less than a million years after the beginning of our solar system, scientists said Monday in the Proceedings of the National Academy of Sciences. In another 2 or 3 million years, this nucleus was 50 times the mass of the Earth.
Scientists have built computer models of the birth of Jupiter. But this study “is the first time we can say something about Jupiter-based measurements in the laboratory,” said study author Thomas Kruijer, a researcher at the Lawrence Livermore National Laboratory in California.
To probe the creation of the planet, the experts sampled extraterrestrial material that happens to land on Earth – ancient meteorites.
Our solar system began as a disk of dust and gas that is 4.6 billion years old. Among the planets, gaseous giants are first arrived, followed by such terrestrial worlds of rock and metal as Earth. Jupiter is the largest spawn.
Although most bulk gas is more than 300 times the mass of the Earth. For this reason, astronomers suspect that the planet was the oldest, it is able to extract more material from the disk before its younger brothers and sisters have appeared.
The new study supports the idea of a first-born Jupiter. When Jupiter was formed, planet growth swept a large area of gas and dust as it passed around the sun.
In addition, it acted as a barrier to protect the interior of the solar system capable of meteorites. When the solar system was about 1 million years old, Jupiter’s gravity was strong enough to prevent the rocks from crossing its orbit, as the club’s gorilla forcing stragglers to wait on the sidewalk.
“In about 1 million years, Jupiter has become large enough to cut the interior of the solar system into the outer solar system,” said Brandon Johnson, a planetary scientist at Brown University, who did not participate in the New research.
Then, when the solar system is about 4 million years old, Jupiter has increased to about 50 times the Earth mass and headed towards the sun. This reduced the gorilla velvet rope, allowing outer asteroids to blend with the inner rocks.
Today, they merge into a belt between Mars and Jupiter. Rocks of this earth mix on Earth, where scientists can study as Kruijer.
The new study adds evidence to the idea that Jupiter has temporarily divided the population of meteorites into the solar system in which they exist between Jupiter and the Sun and those beyond Jupiter.
If a couple of rocks from the interior and exterior landed in your front yard and picked them up after cooling and the dust settled down, you can not detect a difference.
But Kruijer and his colleagues can measure specific chemical signals in meteorites – revealing not only the age of the rocks, but what are the two groups to which they belonged.
It is only recently that advances in technology have allowed scientists to gauge the differences between the two, said Kruijer.
Meteorite groups separated about 1 million years after the formation of the solar system, and have gone until about 4 million years after the formation, according to a new analysis. Fundamentally, the two populations existed simultaneously for a few million years.
“It can not be a change of time. There must be a spatial separation,” Kruijer said.
Something must have separated. The most likely cause, according to the study’s authors, is a young Jupiter. “It’s hard to think of any other possibility,” he said.
“This is an interesting work and presents an interesting result, which corresponds to our current understanding,” said Konstantin Batygin, a planetary astrophysicist at the California Institute of Technology, who did not participate in the research. “This information can be provided.”