Like the earth, do other planets have magnetism?
Specifically a liquid metal core - which means a minimum size of planet to be big enough to have melted the core and large enough to keep it warm.LURCH said:The current theory is that having a magnetic field around a planet is dependant on having a metal core.
Really that simple? My dynamo experience does not lend me to expect that stirring a bowl of quicksilver should produce any magnetic field. Could you expand on how electrical charge is produced (if the mantle were initially neutral) and maintained (when convection sounds slow compared to the conductivity)?mgb_phys said:The overall mecahnism is known, conducing iron flows in convection currents creating effecively a dynamo.
mgb_phys said:Specifically a liquid metal core - which means a minimum size of planet to be big enough to have melted the core and large enough to keep it warm.
Jupiter has a very strong magnetic field, although it doesn't have any metal.
Under the extreme pressures at the centre of Jupiter, Hydrogen can behave a little like a metal.
Magnetism of planets refers to the magnetic field that surrounds a planet, similar to how a bar magnet has a magnetic field around it. This magnetic field is created by the movement of molten iron and nickel in the planet's core.
No, not all planets have a magnetic field. For example, Mars and Venus do not have a strong magnetic field like Earth does. The presence of a magnetic field depends on the planet's size, composition, and rotation.
A planet's magnetic field can protect its atmosphere from being stripped away by solar winds. The magnetic field acts as a shield, deflecting the charged particles of solar winds away from the planet. This is important for maintaining an atmosphere suitable for life.
Yes, a planet's magnetic field can change over time. This process is called geomagnetic reversal, where the magnetic poles of a planet can switch places. This has happened many times in Earth's history, and scientists are still studying the causes and effects of these reversals.
Scientists use a variety of methods to study the magnetism of other planets, such as spacecraft missions, telescopes, and computer simulations. By studying the magnetic fields of other planets, we can gain a better understanding of their composition and formation, as well as the potential for habitability.