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.
Solar cycle 24 was one of the weakest and shortest solar cycle. What are some of the consequences of a major solar storm?
Solution:
Solar storm is a temporary disturbance in earth's magnetosphere caused by the solar winds.
- The increase in solar wind pressure initially compresses the magnetosphere.
- Interaction between the magnetic field of solar winds and Earth's magnetic field transfers an increased energy into the magnetosphere, which in turn causes a solar storm.
- This causes plasma movement through the magnetosphere and the ionosphere.
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