https://www.space.com/mars-opposition-l ... -what-time"This week, the Red Planet is at opposition, meaning it forms a straight line with Earth and the sun, with Earth in the middle. In this alignment, Mars will appear brighter than usual and be much easier to see in the sky. Mars is at opposition just once every 26 months. In addition to being at opposition, this week will also see a lunar occultation of Mars on Wednesday evening (Dec. 7). An occultation is an event in which one object appears to pass behind another in the sky, completely disappearing from view. In this case, Mars will disappear behind the moon and reappear an hour later. "