What is Sun: Sun is the supreme self which is present in all of us. Sun is the Shiva, the unchanged and supreme power. We all can merge in this supreme power through yoga and meditation practice. However through the astrological point of view Sun sign is the astrological point in the birth chart at the time you were born. It is a fiery planet and it rules Leo sign. Depending on the Sun sign and position of the house it is placed, it defines your self esteem, ego, confidence, pride and your health vitality. Whenever the Sun conjunct with other planets it illuminates or hides the quality of that planet depending on the degree of the conjunction.
What is Moon: The Moon is a watery planet and it rules the Cancer sign. Moon is the emotions, and feelings. It is the part of you that reflects your feelings the way you feel. Moon also represents mother, imagination, inner peace and it shows the way you think and react to the situation. How emotional or unemotional you are depends upon the condition of the Moon. Your Moon is your comfort zone or uncomfortable zone depending on the Moon sign and house placement. Moon is a receptive and subconscious mind which acts on past life experiences.
So what happens when the Sun is conjunct with the Moon?
Sun and Moon conjunction:
When the Sun and Moon are in conjunction, it means the person was born on New Moon (black Moon, or Amasaya) if the conjunction is exact. This is like a fire (Sun) comes together with water (Moon). We all have different aspects in our life and they are needed as they are. Moon is the planet of inner peace and what happens if our inner peace gets burned up. I think we will not feel good. This is not a good conjunction to have because it acts like fire and water coming together. This conjunction can show no peace of mind or agitated mind. Depending on the sign it can be less or more detrimental. e.g. If you have this conjunction in Aries then you can be enthusiastic, with a natural feel for new beginnings, and you know how to use your new ideas, but if you have this conjunction in Scorpio where the Moon gets debilitated then what happened? Maybe you may feel more unrestful.
There are many possibilities depending on personal charts. This is just the general meaning and there is no need to take it seriously. Everything has negative as well as positive effects. Positive benefit of this conjunction is that these people are good in meditation because in meditation we try to connect the subconscious mind with our conscious mind together. They have a good instinct for inner feelings and are very clear what they want from their life.
Remedy: My suggestion for these people is that they need to drink a lot of water and try to manage their emotions. They should not react spontaneously and they should think thoroughly before any emotional reaction. They should respect their mother. It does not matter whether they are happy or not with their mother. If your Moon is not in good condition then, it means you have done something wrong with your mother and now in this birth time you need to fix their karma with your mother and if you do not then you will suffer mentally.