As Venus orbits the Sun, by what factor, as viewed from Earth, does its angular size change from smallest to largest? (See Figures 4-13 and 4-14, Universe, 11th ed.(in the text))

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Venus's angular size changes by a factor of about 5.8 as it orbits the Sun, appearing largest when it is closest to Earth and smallest when it is on the opposite side of the Sun from Earth.

As Venus Orbits the Sun, by What Factor, as Viewed