D. C. Pandey Solutions for Chapter: Universe, Exercise 24: Objective Problems [Level 1]

Surface temperature of the sun is approximately 

Two stars $P$ and $Q$ are observed at night. Star $P$ appears reddish while, star $Q$ is white. From this we conclude

Black hole is 

The name black hole is given, because 

The solar constant on the surface of the earth is $S$. What will be its value on the surface of another planet which is about $5.3 \mathrm{AU}$ away from sun?

The wavelength of maximum energy, released during an atomic explosion was $2.93\times {10}^{-10} \mathrm{m}$. Given that the Wien's constant is $2.93\times {10}^{-3} \mathrm{m} \mathrm{K}$, the maximum temperature attained must be of the order of

The hottest planet of solar system is

Which of the nine planets is nearest to sun?