Science, Maths & Technology
An introduction to exoplanets
...becomes evident that Venus and Mercury have phases, similar to the phases of the Moon (Figure 4). [Composite of photographs, taken over a lunar month, shows the changing shape, or phase, of the Moon] Figure 4 This composite of photographs, taken over a lunar month, shows the changing shape, or phase, of the Moon, growing from a thin crescent to full moon and back again...