(AGENPARL) – ven 19 agosto 2022 A weekly compendium of media reports on science and technology achievements at Lawrence Livermore National Laboratory. Though the Laboratory reviews items for overall accuracy, the reporting organizations are responsible for the content in the links below.
LLNL Report, Aug. 19, 2022
Jupiter is not only the largest planet in our solar system, but it’s also the oldest, according to new research from Lawrence Livermore National Laboratory. Image courtesy of NASA.
[Jupiter is one old timer](https://newsbeezer.com/indonesiaeng/the-oldest-planet-in-the-universe-and-solar-system-earth-is-far-out/)
The oldest planet in the universe means it formed billions of years ago. The age of the planet even makes Earth appear young.
Our solar system has one of the oldest planets in the universe: a team of researchers from the Lawrence Livermore National Laboratory and the University of Munster say Jupiter is the oldest.
According to the research team, Jupiter formed 1 million years after the sun about 4.6 billion years ago. Thomas Kruijer, the study’s lead author, explained that Jupiter’s core formed long before the disappearance of the solar nebula’s gas.
[Read More](https://newsbeezer.com/indonesiaeng/the-oldest-planet-in-the-universe-and-solar-system-earth-is-far-out/)
The hexagonal polytype of diamond called Lonsdaleite has been observed in shock compressed material after meteorite impacts.
The graphite-diamond phase transition is of particular interest for fundamental reasons and a wide range of applications.
On very fast compression time scales, material kinetics hinder the transition from graphite to the equilibrium cubic diamond crystal structure that we commonly know as diamond. Shock wave compression of graphite typically requires pressures above 50 GPa (500,000 atmospheres) to observe the phase transition on the time scale of shock compression experiments. Further, the hexagonal polytype of diamond called Lonsdaleite has been observed in shock compressed material subsequent to meteorite impact events, suggesting that the time scale of compression plays a strong role in the phase transition.
In new experiments, Lawrence Livermore National scientists have emulated the conditions of Lonsdaleite formation using picosecond time scale laser compression and observed the transition with state-of -the-art material characterization using femtosecond X-ray pulses.
Map of the western United States with a 3D image of the WUS256 model showing variations in isotropic shear wavespeeds with high/low values indicated by blue/orange. Geologic/tectonic provinces are shown and a few tectonic features are identified.
[New simulations go deep](https://www.hpcwire.com/2022/08/13/supercomputer-simulations-elucidate-shakes-of-explosions-earthquakes/)