© NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
In the Interior of planets and moons It sits very dense essence. And according to a new study, what happens there can happen magnetic field The object caused the effect.
The closest planet to the sun Mercury It is said to have a huge iron core. all 3/4 of the diameter of the planet It's supposed to be the essence. Mercury has a weak magnetic field, and very little is known about it. also Jupiter's moon GanymedeOur king moon And the Mars It probably had such an iron core.
The experiment shows how iron ice can form
2019 Scientists have assumed that… iron At the interface between the inner and outer core crystallization Could you. Researchers have now tested this in an experiment. “This imitates how this”Icy snow” Behaves.
➤ Read more: Iron “snow” is said to fall into the Earth's core
Schematic representation of the evolution of iron ice in the planet's core. The crystals melt near the core, and ice crystals were used in the experiment
© Ludovic Huguet et al.
Researchers use it in experiments Ice crystals. He was in a tank water It is cooled from below with an additional layer salty water. This prevents ice crystals from sticking to the ground.
Crystals provide cyclic flow
This showed that ice crystals that formed below floated to the top. Because the water is warmer there, the ice crystals thaw and dissolve Water flow It becomes slower. This allows new ice crystals to form below, creating a cycle. Overall, this cycle continued 23.3 minutes.
However, this must also happen in the hearts of the planets vice versaSo the snow lies on the outer core boundary. In addition, the dimensions are of course much larger than those found in the laboratory. According to researchers, iron flows energy Hand it over magnetic field From a planet or moon.
The Earth's magnetic field is too strong to be influenced
Mineral snow is also said to occur within the Earth, but the magnetic field is likely too strong to be affected by it. But the magnetic field weakIt could be through iron ice Periodically “turn on” and “turn off” Become. However, more research is needed to investigate this. The results of the study were In the journal Advanced Earth and Space Sciences published.
➤ Read more: Seismic waves show: something is happening in the core of our Earth
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