The Midheaven, or Medium Coeli (MC), represents the highest point in the sky at the time when you were born. Depending on which house system you use, the Midheaven usually corresponds to the angle of the 10th house cusp. The Sun reaches its culmination at the Midheaven and then begins to decline in the sky towards sunset (the Descendant).
When the Sun is at its highest point, everything is brightly lit. The high noon Sun beats straight down on everything underneath it. Shadows appear in stark contrast to their sunny counterparts. Everything is distinct, and easy to see.
The Midheaven illuminates our path in the outer world. A bright light shines on the qualities of the sign of the 10th house cusp. This light also shines on any planets that conjunct it (from the 9th house or from the 10th house).
The Midheaven shows those qualities in ourselves that want recognition from everyone. Because these characteristics want recognition, we often seek a career that allows us to display these qualities.
The Midheaven shows qualities about us that are in plain sight. We don’t have to actively try to embody these characteristics- people recognize them anyway. It’s as if we are saying, “look at me!” without ever consciously being aware that that is we are doing.