First Star Path

I don't really like the novel world where there is only fireball. Since it is fire, it must have a temperature. How many degrees? What are combustibles? I am more realistic. Except for the setting, all the reactions and changes in this book are as real as possible. The content will involve many subjects. If there are any errors, please feel free to discuss them. The original intention of writing the book was that many protagonists would have to use a knife to fight hand-to-hand with people in the later stage, similar to Thanos crossing light years to fight with a bayonet. I was not very acceptable. The book tried its best to be logically rigorous and consistent with science. There is also the ice cone technique. Can ice condense so quickly? What is the kinetic energy of flying out? Why is the shape a cone? Why is it not a parabola when it flies? What is the initial speed? People have to rely on gravity when walking. Even if you fly over with an ice pick, you can help me get down properly, you bastard! ! !