sun and earth distance

The earth is very slowly moving away from the earth, because of the tidal interactions, about a micrometer per year, or a millionth of a meter per year. Another reason why the earth is moving further form the sun is because of nuclear fusion. Nuclear fusion is the sun continuously transforming a small part of its mass into energy. but over the entire main sequence lifetime of the sun (10 billion years) the sun will only lose about .1% of its mass, which roughly means that the earth should about 150,000 km. The earth sun distance is just about 150,000,000 km so the distance that the earth would move over 10 billion years. " If we assume that the Sun's rate of nuclear fusion today is the same as the average rate over those 10 billion years (a bold assumption, but it should give us a rough idea of the answer), then we're moving away from the Sun at the rate of ~1.5 cm (less than an inch) per year. I probably don't even need to mention that this is so small that we don't have to worry about freezing."

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Comments

  1. AnonymousApril 10, 2019 at 8:14 AM

    This is very interesting, I wonder what will happen to life on earth if the sun moves to far away. Will we evolve and continue living on Earth or will we leave for a planet closer to the sun?

    ReplyDelete
  2. AnonymousApril 17, 2019 at 5:26 PM

    Its scary to know that we are moving away from the sun a micrometer away per year. It may only be a little but it will eventually add up.

    ReplyDelete

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