4th house and 10th house
Just like all other opposing houses, the 4th house and 10th house are placed in opposite signs. The 4th house, also known as the Immum Coeli (IC), is the house that indicates our family life, childhood, comfort places, inner world. The 10th house, also known as the Midheaven (MC) represents the way we wanna be seen, the spot we wanna occupy in the world. It is the way we act at our job, school, internet, etc. This being said, the IC is very private and the MC is public. And both are very important houses! Actually, the first 4 houses any person learns about are the Ascendant (1st house), the Descendant (7th house), and these two.
To know your IC/MC is better to have your exact birth time, or as accurate as you can get it (no need to know the exact seconds lol). Just like all the other houses, they move very quickly, and a difference of 10 minutes can make the same house be in two different signs (it happened to me, since my IC/MC are in really really early degrees of taurus/scorpio or really really late degrees of aries/libra)
There are two bloggers that made really good posts about the IC/MC. One of them is pandastrology, and you can find it here (I’ll reblog it later as well) The other one is sadastrology. They made several posts with each IC/MC combination, but as far as I know they didn’t made a masterpost with all the links. Since their posts are super good and helpful i’m gonna link each one down here, to avoid clogging my blog by reblogging them all.
Aries IC // Libra MC
Taurus IC // Scorpio MC
Gemini IC // Sagittarius MC
Cancer IC // Capricorn MC
Leo IC // Aquarius MC
Virgo IC // Pisces MC
Libra IC // Aries MC
Scorpio IC // Taurus MC
Sagittarius IC // Gemini MC
Capricorn IC // Cancer MC
Aquarius IC // Leo MC
Pisces IC // Virgo MC
