This visible surface layer of the Sun produces most of the light we see.

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Your new ahaPhotosphere

It is the Sun's apparent surface Source: Photosphere ↗

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53This central region of the Sun produces energy through nuclear fusion.RECALL
Core
Hydrogen fuses into helium there
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54This stream of charged particles flows outward from the Sun.RECALL
Solar wind
It fills the heliosphere
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55This astronomical distance unit equals the distance light travels in one year.RECALL
Light-year
It measures distance, not time
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