Proving the Existence of the Sun: An SEO-optimized Guide
Irsquo;m guessing yoursquo;ve spent your entire life underground. If you ever make it to the surface, yoursquo;ll find something above you called the sky. During the day when it is lighter, yoursquo;ll notice a bright object in the sky. Have a good long look at it.
If the sky is quite dark when you arrive, that will be night time when the side of the earth you are on is facing away from the sun. If you see a large, bright object in the sky at night, that will be the moon.
What Evidence is There That the Sun Exists?
The evidence that the sun exists is, well, the sun. But we donrsquo;t need to provide any more evidence that the sun exists because no rational person doubts it. Rational doubt means proportioning your belief to the evidence you have. It doesnrsquo;t mean doubting the obvious.
Broader Evidence of an Objective Reality
Apart from our senses, we have no evidence that anything exists. However, there are some things which make it more probable that an objective reality exists outside of our perceptions. One of those is sunburn. I highly doubt that a species capable of creating such a simulation would be so sadistic.
Logical Arguments for the Existence of the Sun
Life on this planet would be impossible without the sun. It is an integral part of our understanding of the world, as surely as is gravity and photosynthesis. To reject the sun is to reject the testimony of every person who ever lived and the evidence that is there for all to see. And thatrsquo;s not an argumentum ad populum because the evidence for the sun is so overwhelming that I canrsquo;t imagine what would lead someone to ask this question unless they have been sheltered their entire life and never seen the sun.
Direct Observations and Scientific Methods
Look into the sky - you can see it. And you can see the difference between the sun being above the horizon during the day and being below the horizon at night. At night, when the moon is up, look at the sky and see the light reflected from the Moonrsquo;s surface.
Point instruments at it - telescopes, etc. - we can image it, measure it, detect radio waves, X-rays, UV light, and infrared radiation from it. Wait for a solar eclipse - we can see the moon move in front of it and block its light.
I am not sure when more proof you need.