Is there a possible correlation between planets with large satellites and magnetospheres?
I started thinking about the gravatational relationship between the Earth and moon and wether that might have an influence on the Earth s core so as to maybe stirr things up. Maybe that has something to do with the magnet energy being generated. That I thought about the rest if the inner planets. None of them have a large magnetic field like we do and none of them have a large satellite like we do. But both Jupiter and Saturn which have large magnetic fields also have large satellites. So I just wanted to see if this makes sense that there might be a correlation?
Anonymous2018-01-12T02:42:53Z
No. Mercury has a magnetosphere and has no moon. There is NO correlation between GLOBAL magneto-spheres and the number of moons a plandet does or does NOT have.
"...Magnetosphere of Mercury Mercury is the only inner planet other than the Earth that has a significant magnetic field (220 nT). This field, along with the planet's high density and small size relative to the Earth, indicates that it probably has a molten iron core. The magnetic field has two poles, and is tilted in the same direction as Mercury's axis. Mariner 10 observed a shock wave called a "bow shock" in front of the planet, where the planet's magnetic field meets the solar wind...."
There is correlation with HOW FAST a planet ROTATES and how STRONG the global magnetic field of a planet or dwarf planet is. Mercury's Global magnetic field is NOT caused by the same thing as Earth's and the Jovian planets magnetic fields.
Mercury's global magnetic field is REMNANT global magnetic field because Mercury's core probably crystallized and become solid quite some time ago. Yes, Mercury DOES rotate as will as revolve around the sun., either # rotations for every 2 revolutions revolutions around the Sun or 2 rotations for every 3 revolutions., but that is not a fast enough rotation create AND MAINTAIN a magnetic dynamo effect like Earth and the Jovian planers have. Mars has Remnant magnetic fields. While Mars may STILL have a liquid outer core, there is not enough liquid outer left for there to magnetic dynamo effect even though Mars DOES rotate relatively rapidly.
Mercury has a 3:2 resonance, 3 rottions for every 2 revolutions around the Sun.
https://www.ncbi.nlm.nih.gov/pubmed/15215857
It IS possible that Mercury MIGHT be the core of once much larger planet.Of course there is no evidence to support this hypothesis AT THIS TIME.
There is NO correlation between the number of moons and how strong or large a planetary GLOBAL magnetosphere is...
No... with Earth, the inner core is solid, the outer core is molten. The inner core is kept hot in part by radioactive decay, and the heat gives rise to currents in the molten core. The examples of Jupiter and Saturn, comparing those huge planets to moons that are, by comparison, very small - while there may be some, minuscule effect, the magnetic field would exist with or without those moons. However - the tidal effects on there moons can be enormous (as we see with Io, for example - the most volcanically active body in the solar system)