Do all planets have a magnetic North?

no, not all do have a single north.

if the molten metal core of a planet cools to where the melted metal doesn't "flow" then its field will either completely die, or if there is little flow, pockets of mag fields appear.

So with that in mind, yes it is possible to have multiple Norths.

some planets have many pockets of fields (like the moon or mars) each pocket contains magnetic north and souths.

http://mgs-mager.gsfc.nasa.gov/publications/grl_28...

blue is south I believe and red would be north.

Jupiter has a HUGE magnetic field just as our own.

http://csep10.phys.utk.edu/astr161/lect/jupiter/ma...

so who ever says WE have the ONLY magnetic field HASN'T been doing their HOMEWORK

http://juno.wisc.edu/Images/using/Science/Objectiv...

this is an "Aurora Borialis" on Jupiter's north poles. apparently 10x bigger than the whole planet earth

Any planet that has a molten core will have a magnetic field, and therefore will have a magnetic north and south.

The magnetic field is generated by a "dynamo effect" in planets with molten outer cores.

But it is possible for a planet to lose its magnetic field if its core solidifies. Mars is one such example - its core cooled eons ago, and it no longer has a global magnetic field (one reason we will need shielding to live on Mars, there is no global field protecting the surface from cosmic radiation).

Venus has a magnetic field, but it was determined that it was generated by an interaction between the ionosphere and the solar wind, rather than by an internal dynamo. Venus's magnetosphere is too weak to protect the atmosphere from cosmic radiation.

Magnetic fields have one North pole and one South pole - that is the physics of magnetism. So a planet will only have one North magnetic pole.

But it may not be the same point as the geographical north pole - its not the same point on Earth. The geographical north pole is based on the point of rotation, and the magnetic poles could be anywhere.

Is chuckling at some of the answers................Zak..............alot of good answers though, and the answer, anything that is magnetically charged has a north and south pole, one end charged negatively and one positively, it is such that the earths magnetic field is symetrical which has drawn us to believe that electric fields move north to south, in effect a magnetic field could be across the planet and not up and down depending on the draw of the field, on Jupiter the north/south could be from side to side, in other words our east to west, there could also be several fields working at the same time causing several magnetic "norths" where in a compass would not work as it would be drawn to several positively charged fields (see also the bermuda triangle), it is unfortunate that our sciences teach electro physics based on a simplified world where laws apply co-hearantly. In conclusion, yes it is posible for a planet to have no electric field, eg dead stars, and yes, several magnetic poles are possible but only if you forget about the way the earth works and look more at the way electrically charged ions are produced at the source and their relationship to their surroundings.

The magnetic pole is considered north but, as was mentioned above, the two are not in the same place. This gave Columbus fits when his compass quit pointing at the north star when he was about half way across the atlantic. Actually, the magnetic north pole is located somewhere around the northern part of Hudson's Bay. Navigating there is done only by the stars and now GPS because a compass there slowly spins in a circle, useless.

Our use of the word "North" is just a way of determining which way a magnetic field flows. As one of the rules of Electro-Mag is no monopoles if a planet has a magnetic field it must have the same number of north and south poles, although it need not be one 1.

Most planets in the system have a magnetic field, however in some cases it is very weak.

not all planets have a magnetic field it takes certain conditions for it to have one, some other planets are thought to have more than two poles such as Jupiter and Saturn these are called 'Quadrupoles'.

Venus is the only planet that does not have a magnetic field

Jupiter has an 'octopole', which, believe it or not, is eight poles. Uranus's poles are north in the south, and south in the north. The planet is almost upside down, and 'rolls' on its side through space.

Poles are created by molten iron cores.

An example of multiple poles is the solar flares on the Sun, there are thousands of poles forming and dying this reaches maximum every eleven years when the imbalance of these pole are so that the link up to some order, and the Sun changes its polarity

Mercury and Mars from what I understand are geologically inactive, and so they cannot generate a magnetic field. Venus, though VERY geologically active, spins so slow, it cannot generate a magnetic field with any real strength, at least in comparison to ours.

yes it is possible, not all plannets have magnetic feilds, ours is a by product of the molten iron and nickel in the spinning outer core. The field fends offmost cosmic radiation, and is one of the biggest things in making the earth habitable