The earth orbits the sun once/year in a nearly circular orbit of radius \(150 \times 10^{6} \mathrm{~km}\). The speed of light is \(c=3 \times 10^{5} \mathrm{~km} / \mathrm{s}\). Looking through a telescope, we observe that a particular star is directly overhead. If the earth were quickly stopped and made to move in the opposite direction at the same speed, at what angle to the vertical would the same star now be observed?