New planet found in the constellation Perseus that has a dying, red giant star for a sun?

I recently read an article about a new planet found in the constellation Perseus that has a dying, red giant star for a sun. The article talked about how the red giant was expanding as it dies, and will eventually consume the planet as it moves ever so closer in proximity. My question is related to this event. The article said our sun is a red dwaft and will expand and comsume earth within the next 5 billion years. It states that in 2 billion years earth's seas will be boiling water. So, is it logical to assume that global warming could also be influenced, or the result of, the sun's expansion towards earth? Dividing 2 billion years by 93 million miles (astronomical unit) gives an average yearly closure of 21 miles. Could be average temperature change per year on earth be positively correlated with a mere 21 miles expansion per year by our sun? Also, what would be the resulting calculation of temperature change per year if that 21 miles were the only factor in earth's temperature change, disregarding global warming?New planet found in the constellation Perseus that has a dying, red giant star for a sun?Our sun will expand into a red giant (its called a yellow dwarf right now, not a red dwarf) in about 4 billion years. But when a sun expands at that point in its life its not a "21 miles per year" gradual thing. It happens actually fairly quickly after the sun uses up most of its hydrogen fuel. The sun is actually getting hotter right now, but at about 1% in one hundred thousand years. And its diameter is growing at the rate of about an inch a year.



The idea is interesting but not supported by our current understanding of solar mechanics. We would know if the sun were expanding at that rate - we can see the tiny expansion of an inch a year, so we would see 21 miles a year easily. And since there would be the same amount of energy being released over a larger area, the sun would become more red each year.



Unfortunately, global warming is caused in large part by human activities - trying to find a cosmic cause is simply refusing responsibility.New planet found in the constellation Perseus that has a dying, red giant star for a sun?blobal arming ????





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New planet found in the constellation Perseus that has a dying, red giant star for a sun?First of all, the Sun is a yellow dwarf, not a red dwarf.



Secondly, the progression of the diameter of a main sequence star from sun-sized to giant does not happen at a constant rate. The Sun will remain at approximately its same size and brightness for the next one and a half billion years, perhaps increasing some twenty percent.



At that time, the hydrogen in the center of the Sun will be exhausted, and helium "ash" will begin to accumulate in its center. This will go on for another four billion years, with the Sun increasing to three times its size and brightness.



Within a few hundred million more years, the processes inside the Sun will change again, and the Sun will make a rapid growth and increase in brightness to four hundred times its diameter and 1500 times its brightness within maybe thirty million years of that.



The Sun is not now expanding or getting brighter by any measurable amount, so it can safely be stated that the aging of our home star is not affecting this unproven thing called "global warming".