The model of the solar system was still not correct, but it would still allow us to correctly calculate the orbits of planets today. And this was so long ago that due to the annual (although small) decrease in solar mass, the orbits of the planets, especially remote ones, would change in a couple of thousand years. They would become large ellipses. This change could prove that the main energy released by the Sun is thermonuclear reactions. But I haven't seen any such articles.
The main source of the released energy, in my opinion, is completely different, and I would even say virtual.
But first, let's turn to a well-known fact.
Electrically charged objects moving relative to us with acceleration emit electromagnetic waves (light – energy).
The sun is electrically charged, and the Earth and everything else, including the entire Universe, revolves around the Sun, if we take the sun as the center of the reference system. And rotation is a movement with acceleration. Speaking in the old-fashioned way – the Earth always "falls" on the Sun and misses.
Rectilinear uniform motion and a state of rest are one thing, and any other motion is a motion with acceleration.
Remember, what does an electric charge moving past you with acceleration do? It radiates.
This radiation is the main source of energy for stars.
Digression: One of the readers of the first edition of this article asked a question.
– And why does no one deal with the energy released by the Sun, as an electrically charged body?
But really, the fact that an electrically charged body moving with acceleration radiates is not a secret. The fact that the Sun is electrically charged is also no secret. The fact that the Earth is moving relative to the Sun with acceleration or the Sun is moving with acceleration relative to the Earth is not a secret at all.
So what's the big deal? Why aren't these calculations available, at least in the public domain?
I assume that the reason is in the "Big Bang theory". If you calculate this energy, it may turn out that the age of the Sun exceeds the age of the Universe, according to the "Big Bang theory". And then what will the "scientists" who have received huge amounts of money for research in the framework of this theory do?
Although there is another source of Solar energy, in addition to possible thermal nuclear reactions and radiation of a charge moving with acceleration.