Tonight it will appear closer, but this is how far away Mars really is ⬇️
Mars orbit, opposition and viewing opportunities
To understand how the distance between Mars and Earth differs so much, we need to look at their orbits. Neither Earth or Mars' orbit is perfectly circular, so the distance between the two is constantly changing. Think of the planets as two cars on a racetrack, with Earth on the inside lane moving faster than Mars — completing roughly two laps in the same time it takes Mars to complete one.
Mars opposition occurs when Earth"catches up" to Mars and is positioned between the sun and the Red Planet. During Mars oppositions, from Earth, we can see Mars rise in the east as the sun sets in the west, with the Red Planet being visible in our skies all night long. Such oppositions occur roughly every 26 months. Every 15 to 17 years we witness very close Mars oppositions when Earth passes between Mars and the sun during Mars' perihelion .
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