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.
![**Question:**
How much more luminous is the Sun viewed from Earth than from Pluto, 40.0 AU away?
**Equation:**
\[
\frac{L_{\text{Sun} \, \text{from Earth}}}{L_{\text{Sun} \, \text{from Pluto}}} = \text{[Blank for answer]}
\]
In this question, students are asked to calculate the relative luminosity of the Sun as viewed from two different locations: Earth and Pluto. The distance of Pluto from the Sun is provided as 40.0 Astronomical Units (AU). Students are meant to find out how much more luminous the Sun appears from Earth compared to Pluto, using the concept of luminosity and distance. The equation involves dividing the luminosity of the Sun from Earth by the luminosity from Pluto.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F774bf996-e9c6-4d9a-8ddc-e817ff6a1997%2F128eab8e-8c9e-44b1-9287-1657ba346e50%2Fys5uhoe_processed.jpeg&w=3840&q=75)
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