If The Sun Was The Size Of The LARGEST Star

At the center of our solar system lies the sun, and at nearly 1.4 million kilometers in diameter, the sun is pretty massive. Just comparing it to everything else in the solar system, it is quite literally, astronomically gigantic. But as we all know, this gigantic star will very, very quickly become completely- Since the sun is so tiny, it makes one wonder what would happen if another star were placed in the center of our solar system, whether the star be larger or smaller. For example, Sirius A, the brightest star in the sky apart from the sun, would be a little less than two times larger than the sun, but midday on Earth would be about 23 times brighter, and the average temperature would be about 370 degrees Celsius. For comparison, the average temperature on Earth with the sun at the center of the solar system is only about 15 degrees Celsius. What's quite shocking is that if the smallest star we know of, whose name I will not state because- Anyway, despite this star being smaller than our sun, and literally smaller than Jupiter and Saturn, if this star were placed in the center of our solar system, noon on Earth would still be about three times brighter than with the sun at the center, and the average temperature on Earth would be about 110 degrees Celsius. But not all stars smaller than our sun would produce such results. Our solar system's closest neighboring star, Proxima Centauri, is about twice the size of EBLM J0555-57AB. If Proxima Centauri were placed in the center of our solar system, the average temperature on Earth would be around negative 216 degrees Celsius, which is about the temperature on Neptune. Midday on Earth would be about 20,000 times dimmer. That's over 20 times dimmer than noon on Neptune, with the sun at the center of the solar system. Pollux is a very large, yet very small star. Its diameter is about five times larger than that of Sirius A, or about nine times that of the sun. If Pollux were placed in the center of the solar system, noon on Earth would be about 35 times brighter, and the average temperature would be about 430 degrees Celsius. That's nearly the temperature on Venus, the hottest planet in the solar system. Pollux is over four times larger than Pollux, placing the surface of the star about halfway to the orbit of Mercury. At this incredible size, midday on Earth would be over 3,000 times brighter than with the sun at the center of the solar system, and the average temperature on Earth would be over 1,600 degrees Celsius. That's hot enough to melt steel. But continuing on, Rigel is over two times larger than Polaris, making it nearly 80 times larger than the sun, and placing its surface at the orbit of Mercury. At such a massive size, midday on Earth would be and the average temperature on Earth would be over 6,000 degrees Celsius. That's hot enough to melt diamond. But Betelgeuse is significantly larger. From the perspective of Earth, Betelgeuse would engulf Mercury, Venus, Earth, Mars, and the asteroid belt, coming a mere 247 million kilometers shy of the orbit of Jupiter. A mere 247 million kilometers? Despite the star completely engulfing half the solar system, its surface is still nearly 100 million kilometers farther from Jupiter than the sun is from Earth. Midday on Jupiter would be nearly 7,000 times brighter than midday on Earth with the sun at the center of the solar system. The average temperature on Jupiter would be nearly 4,000 degrees Celsius, compared to the typical negative 108 degrees Celsius when the sun is the star in the center of the solar system. Vycanus Majoris is one of the most commonly known stars, because until recent years, it was the largest star known. At about 1.9 billion kilometers in diameter, Vycanus Majoris is nearly twice the size of Betelgeuse. If placed in the center of the solar system, Vycanus Majoris would completely engulf Jupiter's orbit, but its surface would still lie nearly 450 million kilometers from Saturn, a distance far enough to fit over 300 suns. The average temperature on Saturn would rise to about 3,500 degrees Celsius, compared to the typical negative 139 degrees Celsius. However, as Vycanus Majoris would be so far from Saturn, noon on Saturn would only be about 18 times brighter than a typical noon on Earth. Ui Scuti, the previous record holder for the largest known star, would be about 17% larger than Vycanus Majoris, but midday on Saturn would rise to be nearly 10,000 times brighter than a normal noon on Earth, and the average temperature would increase to around 5,000 degrees Celsius. And now the star we've all been waiting for. The current record holder for the largest known star, Stevenson 218, with a diameter over 2,000 times larger than the diameter of the sun, would completely engulf the orbit of Saturn, and its surface would only lie over 1.3 billion kilometers from Uranus. A star so gigantic that it completely engulfs the first 6 planets of the solar system would barely even make it halfway to the orbit of Uranus. But despite this anticlimactic star trying to destroy my video, noon on Uranus would still be over 3,000 times brighter than a typical noon on Earth, and the average temperature on Uranus would be raised from about negative 197 degrees Celsius to over 2,000 degrees Celsius. And just knowing the very unsettling fact that Earth is sitting at the center of this star being completely incinerated at 30,000 degrees Celsius, I think it's safe to say that our solar system was much better designed with the sun at the center than with the atrociously monstrous Stevenson 218.