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.
This time we have a non-rotating space station in the shape of a long thin uniform rod of mass 1.79 x 10^6 kg and length 1323 meters. Small probes of mass 5796 kg are periodically launched in pairs from two points on the rod-shaped part of the station as shown, launching at a speed of 2268 m/s with respect to the launch points, which are each located 453 m from the center of the rod. After 17 pairs of probes have launched, how fast will the station be spinning?
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