Question

A. if you are the sun, write about your properties in your own words.
B. Describe white dwarfs.

Answer 1

A. Following are the various properties of me as a Sun:

• I am 4.5$\times {10}^9\mathrm{yr}$ old.
• I have my own heat and light.
• I am made up of hot gases. Hydrogen contributes to 72% of my mass while helium about 26%. The rest 2% is associated with elements heavier than helium.
• My mass and radius is about 2$\times {10}^{30}\mathrm{kg}$ and 695700 km, respectively.
• My surface temperature is about 5800 K and temperature at the centre is 1.5 $\times {10}^7$ K.

B. White dwarfs are the end stage of low mass stars. These are those stars

• whose density is very high compared to that of Earth
• which are very stable and small sized
• which appears white in colour
• whose initial mass < 8M_Sun