The earth is ~150 million km (147-152 million) from the sun. Light moves at 300,000 km/second. Dividing the 2, you get 500 seconds which turns out to be 8m 20s. At the earth's closest point it would take 490 seconds and at the furthest point would take 508 seconds.

You might want to keep your winter coat close in case this happens!

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