Place the large black ball (black hole) in the center of the sheet. Experiment with different sized balls (planets) in an attempt to get them to travel (orbit) around the black hole without falling into it. Based on your observations, choose the correct response(s) below: faster slower Balls traveling closer to the center move: faster slower Balls traveling further from the center may move: fly off the simulator crash into the center Balls orbiting at higher speeds: fly off the simulator crash into the center Balls orbiting at lower speeds:
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.
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