Albedo is maximum for

The image shows a diagram of the solar system. Which of the following planets is known as the 'Red Planet'?

The temperature of the Earth without the greenhouse effect would be: (in $^{\circ} C$)

If a galaxy is at a distance of $430$ million light years from us,what is the Hubble's constant in $km s^{-1}$ per million light years? Its speed is $6.48 \times 10^6 m s^{-1}$.

Which of the following is the coldest planet?

The hottest type of stars are called