photosphere

Converse of object

• call: The white circle in the center marks the position of the Sun's surface ( called the photosphere ).
• reach: They are converted from gamma-ray / x-ray photons to Ultraviolet photons and then finally to visible photons when they reach the photosphere.

Adjective modifier

• solar: On the other hand, the " cool " solar photosphere emits very few x-rays.