in conjunction
From MCCONNELL 298: "At conjunction, the Earth and Mars are on opposite sides of the Sun."
From HUGHES AND GEDULD 225: "Mars and Earth are in (superior) conjunction, and farthest from each other, when they are lined up with the sun between them; they are in opposition, and closest to each other, when they are lined up with Earth between Mars and the sun."
From DANAHAY 189: "It is far away from earth, but will be 'in opposition' again."

