the sun
The Earth is the only body in our solar system that has experienced magnetic pole reversals in its history. This phenomenon is when the magnetic north and south poles switch positions, and it has occurred several times over the past billion years.
Jupiter is the largest planet in our solar system, but the Sun is the biggest body.
But ... there are many bodies in our Solar system that have no atmosphere.
The Sun is the only luminous body in our solar system. It emits light and heat through nuclear fusion at its core. All other objects in the solar system, such as planets, moons, and asteroids, reflect light from the Sun but do not generate their own light.
The largest body in the Solar System is of course the Sun. If we are not including the Sun than Jupiter would be by far the largest body in our Solar System. Jupiter has a diameter roughly 11 times that of Earth but has a mass less than one thousandth that of the sun.
the sun
The Earth is the only body in our solar system that has experienced magnetic pole reversals in its history. This phenomenon is when the magnetic north and south poles switch positions, and it has occurred several times over the past billion years.
Jupiter's moon, Ganymede, is the only moon in the solar system known to have its own magnetic field. This magnetic field is believed to be generated by a liquid iron core, similar to Earth's. No other moon in our solar system has a magnetic field.
The center body of the solar system is the Sun.
The largest non-planetary body in the solar system is Ganymede, one of Jupiter's moons. Ganymede is even larger than the planet Mercury and is the only moon known to have its own magnetic field.
A magnetic reversal happens in a magnetic field generated naturally in a spinning object such as the Earth or the Sun. In cases where the magnetic field is generated as a result of spin the polarity of the field (where the north and south poles are) flips on a regular periodic basis. For instance about once every 11 years on the Sun and about every 100 thousand years on the Earth. This flipping of the field is called a 'magnetic reversal' on Earth and a solar cycle on the Sun. Between flipping events the magnetic field of the body is regular or normal (but of cause in the opposite orientation each flip) but during the flipping process the field is chaotic with many minor polar regions appearing round the body (as sunspots during a solar maxima) and presumable a similar but slower thing happens on Earth (we do not know yet but it looks as though the Earth's poles may be beginning to reverse at the moment).
You mean - of THE solar system ?? That would be the sun.
The Sun is the central and largest body of the Solar System - but it is not a planet.
Jupiter is the largest planet in our solar system, but the Sun is the biggest body.
But ... there are many bodies in our Solar system that have no atmosphere.
This has happened on Earth, according to the geological record. Since it happened on Earth, it may also have happened on other bodies.
The central body of every solar system is a star.