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Why the early magnetic field of the moon can be responsible for life on earth

The habitat of a planet depends on many factors. One is the presence of a strong and long life magnetic field. These fields form thousands of kilometers below the planet’s surface in its liquid form and extend into space – protecting the atmosphere from harmful solar radiation.

Without a strong magnetic field, a planet struggles to hang in a breathless atmosphere – which is bad news for the life we ​​know. A new study, published in Science Advances, suggests that the now lost Moon is a magnetic field that could help protect our planet’s atmosphere as life formed about 4 billion years ago.

Today, Earth has a powerful global magnetic field that protects the atmosphere and low-orbiting satellites from harsh solar radiation. In contrast, the Moon does not contain either a breathing atmosphere or a global magnetic field.

Global fields are formed by the movement of molten iron at the cores of planets and moons. Maintaining fluid movement requires energy, such as heat trapped inside the core. When there is not enough energy, the farm dies.

Without a global magnetic field, the particles of solar wind (radiation from the Sun) passing near a planet form electric fields that can accelerate the charged atoms, known as ions , outside the environment. This process is now happening on Mars and it is losing oxygen as a result ̵

1; something that is directly measured by the Mars atmosphere and mission change (Maven) mission. Solar wind can also strike the air and knock molecules into space.

The Maven team estimated that the amount of oxygen lost from the Martian atmosphere throughout its history was equivalent to content in a global water layer, 23 meters thick.

[Read: The Moon’s surface is rusting — and Earth may be to blame]

Application of ancient magnetic fields

New research investigates how early Earth and Moon can interact. But investigating these ancient fields is not easy. Scientists rely on ancient rocks that contain particles that are magnetized as rocks form, which saves the direction and strength of the magnetic field at that time and place. Such stones are rare and the acquisition of their magnetic signal requires careful and delicate laboratory measurement.

A picture of the ancient moon with magnetic field lines.