(a(i))[1]
State why the gravitational field strength at the Earth’s surface is greater than the gravitational field strength at the surface of Venus.
(a(ii))[3]
Calculate the time, in Earth days, needed for one day on Venus.
(a(iii))[4]
Calculate the time taken for light to go from the Sun to Venus.
(b)[2]
Explain what one light-year means.