Which among the following justifies aurora borealis’ connection to Earth acting as a gigantic magnet?*         The sun’s ejected charged particles are deflected towards the poles of where Earth’s magnetic field is the strongest       The magnetic field lines are equally spaced at the poles that it arranges the charged particles from the sun accordingly       The solar wind from the sun interacts with the Earth’s ionosphere       The magnetic field which is negligible in the poles pull towards them the sun’s ejected charged particles

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Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.