Is there a possible correlation between planets with large satellites and magnetospheres?

Question

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?

Anonymous · Answer

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...."

https://www.windows2universe.org/mercury/Magnetosphere/magsphere_overview.html

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...

quantumclaustrophobe · Answer

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)

Is there a possible correlation between planets with large satellites and magnetospheres?

2 Answers