To Astronomers & students of astronomy: Expansion rate of the sun?

Question

We currently know that the sun is expanding and eventually will become a Red Giant in about 5 billion years. My question is what is the annual rate of expansion of the sun? As the sun expends it's core mass and expands does it get that much closer to earth? I know the earth moves away from the sun approx. 1.5cm/yr. (Please correct me if I am mistaken). Would this rate of expansion cause more heat to come to the earth? I know there are several questions here but please start with the known expansion rate.
Thank you for your answers

Answer 1

I think right now (the past few million years or so and the next few million years), the Sun's size is pretty constant, with some oscillations around the average size. These oscillations have a mostly 11.8 year cycle, with an amplitude of 0.2 arc-seconds. The sun's average size is 32 arc-minutes.

1 degree = 60 arc-minutes = 3600 arc-seconds.
1 arc-minute = 60 arc-seconds.

Answer 2

Hi. The expansion will not start until much more of the fuel (hydrogen) has been fused. The largest heating effect will be due to the larger portion of the sky that the Sun will cover more than a decrease in radial distance, at least at first.

Answer 3

The Sun is expanding burning at a rate of 600 tons and its diameter increase in size. it might take 18,000 years to reach 108 to 109. It means once it was 108 times larger than the earth s diameter, and now it is almost 109. The earth will move from its current orbital position; quantum **** take place increasing number of days per year etc

Answer 4

the sun is currently in its comfort zone with the gravitational pull caused by its mass equaling the energy within trying to blow it apart. when the fuel begins to run out this equilibrium will stop and it will start to expand i guess at much more than 1.5cm a year