\relax \@writefile{toc}{\contentsline {subsection}{\numberline {15.1}Precession of Planetary Orbits}{96}} \@writefile{toc}{\contentsline {subsubsection}{\numberline {15.1.1}Circular Orbits}{97}} \@writefile{lof}{\contentsline {figure}{\numberline {1}{\ignorespaces The elliptical orbit of a planet around the Sun.}}{98}} \@writefile{toc}{\contentsline {subsubsection}{\numberline {15.1.2}Non-circular orbits}{98}} \@writefile{lof}{\contentsline {figure}{\numberline {2}{\ignorespaces Precession of an elliptical orbit (greatly exaggerated).}}{99}} \@writefile{toc}{\contentsline {subsection}{\numberline {15.2}Radar Echos}{101}} \@writefile{lof}{\contentsline {figure}{\numberline {3}{\ignorespaces Photon path from Earth to Venus deflected by the Sun}}{101}}