Conjunction ☌
=> 0 Degrees (0-6) or in the same sign/house
• Energies blend, can cause friction
• Fusion 
• Transit : A feeling within you, you taking action most of the time
• Considered harmonious depending on the planets involved
• Could act as a blind spot especially with the Sun (=combust)
• In aspect maximum orb of 6°

Sextile ⚹
=> 60 Degrees or 2 signs/houses apart
• Energies supporting eachother, makes lazy
• Cooperation
• Transit : Good for harmonizing relationships
• Considered harmonious but makes lazy, weakest aspect, shows talents
• In aspect maximum orb of 3°

Square □
=> 90 Degrees or 3 signs/houses apart
• Creates friction, considered hard and challenging, stimulates action
• Conflict
• Transit : Brings tension, action or breakups in relationships
• Could be considered as ‘good’ because it stimulates action
• In aspect maximum orb of 3°

Trine △
=> 120 Degrees or 4 signs/houses apart
• Assists and brings opportunities, natural talents
• Harmony
• Transit : Brings new opportunities in relationships, circumstances
• Considered harmonious, cooperative energy of two planets
• In aspect maximum orb of 12°

Opposition ☍
=> 180 Degrees or in the opposite sign/house
• Attraction, considered hard and challenging
• Separation
• Transit : Others or circumstances outside of your control create events
• Different energies
• In aspect maximum orb of 5°