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If the Sun is 100% offline then we're all dead anyway.

Generally we can rely on there being a day though. Can even predict sunrise and sunset.

When i go outside, sometimes there are clouds between the Sun and myself

When I go outside on a cloudy day I can still see clearly because there's still electromagnetic radiation from the Sun reaching the Earth.

Is that your way of saying that solar panels work when it’s cloudy? A bit of a daft comment.