Yes, this is true. The only celestial body in the Milky Way universe that produces light is the Sun. It is the sole source of light for all the other planets and satellites. Our moon only 'borrows' light from the Sun. The surface of the moon acts as the mirror at which the Sun's light is reflected.
The greater the mass the greater is inertia.
The hotter an object is, the more kinetic energy it has, but i'm not sure what is the exact word missing??
The total distance you haved walked should be 2.6 miles