
There are different sorts of magnets. The strongest permanent magnets are made from a material called Neodymium (Nd). They are made from this material, iron and boron. They can be nearly 8000 times stronger than the Earths magnetic field at it’s poles. An electromagnet can be a lot stronger but are not permanent as they need a huge electric current to produce a magnetic field. The strongest magnets we know of in the universe are magnetars. These are very rare magnetic neutron stars. Their magnetic field is so strong they could stop a train from 250,000 miles away. Steve