Do all planets have a magnetic core? and since we have never dug deeper than 7 miles is a magnetic core just theory?

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  • Do all planets have a magnetic core? and since we have never dug deeper than 7 miles is a magnetic core just theory?


Anonymous929695 | 22/08 2017 18:05
planets are actually direct current electric motors and rotate because the the outer shell is the body of the motor and is not attached to to the armature (the core)
Positive: 55.555555555556 %
Answer #2 | 07/03 2017 21:18
the apparent answer is no. Mars seems to not have such a core because Mars has, effectively, no magnetic field around it. and as to why we believe it is there -- the magnetic field proves that something magnetic or electrical is there. [electricity and magnetism are two aspects of the same thing]
Positive: 55.555555555556 %
Answer #3 | 07/03 2017 21:19
You do realize that compasses are magnets right and that compasses are affected by the earth's magnetic field???
Positive: 50 %
Answer #4 | 07/03 2017 21:04
No, all planets do not have a magnetic core.
Positive: 50 %
Answer #5 | 07/03 2017 22:15
Not all do. Mars, for example, does not, and it's though that it's core has cooled and become solid. Magnetism isn't just theory - it can be measured (assuming it exists), and there are even some migratory animals that can sense the magnetic field of Earth.
Positive: 50 %
Answer #6 | 07/03 2017 21:22
Yes, all planets DO have iron nickel cores. because iron has the highest specific GRAVITY, NOT density of the 10 most common elements in the Universe. When a planet chemically differentiates iron and nickel settle to form the core of the planet.. The planet has to be rotating RAPIDLY enough AND LIQUID OUTER CORE to set magnetic dynamo effect that will give the planet a GLOBAL magnetic field. THIS NOT JUST THEORY. Mars outer liquid core has solidified enough because it has cooled down over time enough to crystallize that Mars NO LONGER has a Global magnetic field, but DOES have REGIONAL magn etic fields. The reason Venus does not have a constently detectable GLOBAL magnetic field is that Venus does NOT ROTATE FAST ENOGH to for their to be magnetic dynamo effect. That hose are teasons WHY Mars and venus no longer or do not have GLOBAL magnetic fields. I used to think there really is n o such thing as as stupid person, but n ow a know there blatant ignorant pathological people who are incapable of ever learning ANYTHING WITHOUT picking a fight. OVER AN D OVER AN D OVER. WHY I spend my time on answering these TARGETED BAIT AND PHISH question i mazes me. You are unteachable. You cna't mage reality.
Positive: 50 %
Anonymous929695 | 22/08 2017 18:08
what made the big bang BS what made the void? How big was the void?
Positive: 50 %
Answer #8 | 09/03 2017 00:27
You are using "theory" in the non-scientific way - like a "guess" - but a proposal awaiting proof is a hypothesis while a scientific theory is strongly supported by various kinds of evidence. The existence of the core is supported most strongly by the movement of earthquake waves through the earth and where they can be sensed remotely and where they disappear.
Positive: 50 %
Answer #9 | 08/03 2017 00:50
No. To generate a magnetic field, you need a liquid metal core that will generate electric current inside itself because it's moving around, and that generates magnetism by electromagnetic induction. If the core has cooled down, that won't be happening, and that would certainly be true of a smaller planet. A bigger planet keeps its internal heat longer, but it still needs to be spinning fast enough to get that motion going inside. Which is why Venus doesn't have a significant magnetic field though it's about the same size as the Earth - it rotates too slowly. This is not just theory. Measurements of earthquakes show that for the pressure waves to be as they are recorded to be, the Earth must have a liquid core deep down. (And a solid inner core inside that.)
Positive: 50 %

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