The sun radiates energy in all directions. The average radiations received on the earth surface from the sun is `1.4 "kilowatt"//m^2`. The average earth-sun distance is `1.5 xx 10^11` meters. The mass lost by the sun per day is.

Express the average distance of the earth from the sun in parsec.

The mean distance of sun from the earth is 1.5xx10^8km . The time taken by light to reach earth from the sun is

(a) Estimate the average orbital speed of the earth going around the sun. The average Earth-sun distance is 1.5xx10^(11)m. (b) An asteroid going around the sun has an average orbital speed of 15 km/s. Is the asteroid farther from the sun or closer to the sun as compared to the Earth? Explain your answer.

The angular diameter of the sun is 1920". If the distance of the sun from the earth is 1.5xx10^(11) m, what is the linear diameter of the sun ?

The angular diameter of the sun is 1920". If the distance of the sun from the earth is 1.5xx10^(11) m, what is the linear diameter of the sun ?

The surface temperature of the sun is T_(0) and it is at average distance d from a planet. The radius of the sun is R . The temperature at which planet radiates the energy is

The surface temperature of the sun is T_(0) and it is at average distance d from a planet. The radius of the sun is R . The temperature at which planet radiates the energy is

Assuming the average distance of the earth from the sun to be 149700000 km and the angle subtended by the sun at the eye of a person on the earth to be 32', find the sun's diameter.