Leo is represented by the Sun, sitting at the center of our solar system acting as a source of light to the planets that loyally orbit around it. It is related to happiness, the heart, and the ego. It is what we create in the moment of fun. 
Aquarius is the antithesis of this. It is Leo’s polar. It is anarchy, it’s unconventionality. It’s the head focusing on the solutions to all the problems of the world in such a logical and original way that only Aquarius can understand. 
When you’re born with the Sun in Leo (July 23-Aug22) you find that the part of you that wants to shine brightly does so in a very natural way. The Sun is at home in Leo and acts blissfully. You have a pull that nobody can deny. 

When you’re born with the Sun in Aquarius (Jan 20-Feb 18) you find that the part of you that wants to shine brightly does so by helping others to shine brightly. Finding your own sunlight can be hard. Mental energy can be heavy on the Aquarian heart. Mental worries. 

With an Aquarius Sun, balance is important to finding happiness. Sometimes you have to pull away from all the problems of the world and just enjoy the flow of life, no matter what that flow may be, cause knowing you, it’s gonna be a unique one.