If you were to add an imaginary star with such extreme characteristics (1000000 Solar masses and 100000 kelvins) into a completely empty space or nothingness, several things could happen: 1. Collapse into a black hole: Stars that are significantly more massive than our Sun have a higher chance of collapsing into a black hole when they exhaust their nuclear fuel. Given the enormous mass of your imaginary star, it is likely that it would collapse under its own gravity and form a black hole. 2. Explode as a supernova: Alternatively, if the imaginary star has not yet reached the end of its life cycle, it could go through a rapid and cataclysmic explosion known as a supernova. This typically occurs when the star runs out of nuclear fuel and its core collapses, causing a massive explosion that can outshine entire galaxies. It's important to note that these hypothetical scenarios may not follow the laws of physics as we currently understand them, as your imaginary star's mass and temperature greatly surpass any real astronomical objects observed so far.