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Petrichor ᚄᚔᚅᚐᚁᚆᚃᚒᚔᚂ

, a question: is the moon always in the same place when it's full? (ie is it always to the southeast of my house) - or does it change by month or season?

@sinabhfuil I am not an astronomer, but the relative position of the sun, earth and moon are always the same at full moon (they are in a line with the earth in the middle). Because the moon’s orbit is not circular, the moon may be at a slightly different distance to earth from one full moon to another, which means we get “supermoons” about one time in 4 because the moon is closer to us due to the elliptical nature of its orbit.

I learned this through playing Kerbal Space Program!

@sinabhfuil When exactly full, it will always be south of you at midnight. At this time of year, near the equinox, it will rise in the east at about sunset and set in the west at dawn.

@gorhendad_oldbuck @sinabhfuil That's true as long as you're in the northern hemisphere (which we all are). In the southern hemisphere, the full moon is always exactly north at midnight.

At 5.14° of the equator, the full moon is directly overhead at midnight, because 5.14° is the angle the ecliptic and the plane of the moon's orbit.

Between the equator and 5.14° north, the full moon is just slightly in the northern part of the sky at midnight. The reverse is true above 5.14° south.

@Infrapink @sinabhfuil yes, since Petrichor said it was towards the South and was posting on an Irish server I took an educated guess :-) I was on Gran Canaria during the winter an it was shocking how high the (first quarter) moon appeared in the sky - almost disconcerting to anybody from mid-northern latitudes.

@sinabhfuil pretty sure it works on the same principles as the sun and Stonehenge.