The sun’s interior consists of:

• Core (about 400,000 km in diameter)
• Convection zone (about 200,000 km thick)
• Radiation zone (about 300,000 km thick)
• Chromosphere (about 1500 km thick)
• Photosphere (visible surface)
• Prominence
• Solar flare
• Sunspot (cool region)
• Granulated surface (caused by convection)
• Corona (extending millions of km into space)