| A | B |
|---|
| Opposition | The angle between the Sun and planet is 180 degrees |
| Western Quadrature | Visible in the morning |
| Eastern Quadrature | Visible in the evening |
| Opposition | Visible from sunset to sunrise |
| Conjunction | The angle between the Sun and planet is 0 degrees |
| Quadrature | The angle between the Sun and planet is 90 degrees |
| Inferior conjunction | The angle between the Sun and planet is 0 degrees |
| Superior conjunction | The angle between the Sun and planet is 0 degrees |
| Visible morning or evening only | Mercury and Venus |
| Superior Conjunction | Behind the Sun |
| Inferior Conjunction | In front of the Sun |
| Visible in the evening | Greatest Eastern Elongation |
| Visible in the morning | Greatest Western Elongation |
