How long does it take for heat to reach us from the sun?

22 February 2009

Question

How long does it take for heat to reach us from the sun? It’s about 8 minutes, the distance between the sun and the Earth because light travels at about 1 billion km/h and the sun is about 150 million km away from the Earth.

Answer

Chris - The answer is that heat arrives in the form of light, at visible and infra-red wavelengths, largely, that's reach us from the Sun. Light is electromagnetic radiation, which propagates about about 300 million metres per second. So that too takes 8 minutes to get here...

Comments

So if the sun is our nearest star if other stars let of heat ? Do we also collect heat from them ? If so the goldylocks zone is just a myth and we are only on this planet because the stars behind our star heat other stars around them ' just like a single block of coal will not keep its heat unless surrounded by heat

I think it is 8 minutes as that's what is written in other websites as well

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