You observe a star orbiting the massive object at the galactic center at a speed of 1090 km/s in a circular orbit with a radius of 18 light-days. Calculate the mass of the object the star is orbiting. Enter in solar masses Hint: The orbital velocity equation is v=sqrt(G M / R). Also note that the orbital radius is in light DAYS.
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.
- You observe a star orbiting the massive object at the galactic center at a speed of 1090 km/s in a circular orbit with a radius of 18 light-days. Calculate the mass of the object the star is orbiting. Enter in solar masses
Hint: The orbital velocity equation is v=sqrt(G M / R). Also note that the orbital radius is in light DAYS.
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