Tech & Science Jupiter is the oldest planet in the Solar System

11:15  18 june  2017
11:15  18 june  2017 Source:   Engadget UK

Jupiter may be even older than we thought

  Jupiter may be even older than we thought A new study from researchers at the University of Münster and Lawrence Livermore National Lab in California suggests that Jupiter may have begun forming within one million years of the very first inklings of the solar system. Previous studies suggested that Jupiter was one of our older neighbors, but they provided a generous estimate that it formed within 10 million years after the birth of the solar system. These studies were based on models, though, not data; instead of analyzing samples from Jupiter to estimate its age, these studies estimated the period during which the gases required to form a giant like Jupiter were prevalent.

"The most plausible mechanism for this efficient separation is the formation of Jupiter , opening a gap in the disc and preventing the exchange of material between the two reservoirs," said Kruijer. " Jupiter is the oldest planet of the solar system

"The most plausible mechanism for this efficient separation is the formation of Jupiter , opening a gap in the disc and preventing the exchange of material between the two reservoirs," said Kruijer. " Jupiter is the oldest planet of the solar system

  Jupiter is the oldest planet in the Solar System © Provided by Engadget UK

Jupiter's ancient name really is well-deserved: according to a new study, the king of the planets isn't just the largest in the Solar System, it's also the oldest. A team of researchers from Lawrence Livermore National Laboratory in California and the University of Munster in Germany have determined that Jupiter's core was already 20 times the size of Earth merely 1 million years after the sun took shape 4.6 billion years ago. Since newborn stars tend to release energy that blows away gas and dust for planet formation, the gas giant must have had to absorb materials very, very fast.

Jupiter may be even older than we thought

  Jupiter may be even older than we thought A new study from researchers at the University of Münster and Lawrence Livermore National Lab in California suggests that Jupiter may have begun forming within one million years of the very first inklings of the solar system. Previous studies suggested that Jupiter was one of our older neighbors, but they provided a generous estimate that it formed within 10 million years after the birth of the solar system. These studies were based on models, though, not data; instead of analyzing samples from Jupiter to estimate its age, these studies estimated the period during which the gases required to form a giant like Jupiter were prevalent.

"The most plausible mechanism for this efficient separation is the formation of Jupiter , opening a gap in the disc and preventing the exchange of material between the two reservoirs," said Kruijer. " Jupiter is the oldest planet of the solar system

"The most plausible mechanism for this efficient separation is the formation of Jupiter , opening a gap in the disc and preventing the exchange of material between the two reservoirs," said Kruijer. " Jupiter is the oldest planet of the solar system

The team came to the conclusion after testing for the presence and abundances of molybdenum and tungsten isotopes in some iron meteorites that fell to Earth. They found that the meteorites contained components from two distinct reservoir of materials, thanks to the data from the molybdenum isotopes. One reservoir has material from a different star than ours that didn't make it to the other reservoir. The data from the tungsten isotopes, on the other hand, showed that the two pools of materials were separated for 2 to 3 million years. In addition, they've been separated as early as a million years into the formation of the solar system.

The team explained that "the most plausible mechanism to efficiently separate two disk reservoirs for an extended period is the accretion of a giant planet in between them." Yes, that gas giant is Jupiter, and while its formation slowed as the years went by, it kept growing and growing enough to create a permanent barrier between the two pools. The researchers now believe that it could also be the reason why there are no super-Earths near the sun, which are commonly found in other star systems. That means we could owe our existence to Jupiter, because who knows if and how life would flourish on Earth if it's too near other, more massive planets.

Uranus' Magnetosphere Opens And Closes Each Day, Study Finds .
The planet lets in solar wind by acting like a light switch.In what could be described as its “on” position, the planet allows solar wind to flow into it. In its “off” position, the planet deflects solar wind by closing up. The process occurs each and every day, the scientists said. Earth’s magnetosphere, in contrast, typically only alters between open and closed in response to changes in solar wind.

Source: http://uk.pressfrom.com/news/tech-science/-173338-jupiter-is-the-oldest-planet-in-the-solar-system/

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