Metal-fueled rockets are one type of the ion engine. Or they use the same method to create thrust as ion engines. The metal rocket uses metal vapor that the magnets drive backward. In space or inside the asteroid belt the system can get its energy from large solar panels. And outside the asteroid belt, the miniature nuclear reactor can give electricity to that system. In that kind of system, the long solar panels can also be used as a cooling system for the nuclear reactor. The metal engine can also use another material that it vaporizes. The metal engine can use magnetic metals as neutral atoms, which it drives through the acceleration track. But it can use ions and also things like water or hydrocarbons. In the last cases, the system ionizes material that travels through its acceleration track. Or it just raises the material temperature to make it expand. In those systems, the electric arc or some other electromagnetic radiation replaces combustion and causes the expansion of the fue
"As the Sun matures into a Red Giant, the oceans will boil and Earth will become uninhabitable." (The Conversation, The sun won’t die for 5 billion years, so why do humans have only 1 billion years left on Earth?) Sooner or later, all stars use their hydrogen. And then they turn into red giants. Sun is a yellow G spectral class star that turns into a white dwarf. But before that, the sun will turn larger. The sun turns red and that means. It starts to send more infrared radiation. This thing will turn Earth into a hellish temperature that vaporizes water from Earth. It's possible. That Earth will also vaporize with Venus and Mercury. Some scientists say that we have only 1 billion years to move farther in the solar system. The habitable zone will go to the distance of Jupiter and Saturn, and maybe humans find a safe place in those distant moons. It's possible that before Sun will grow too large humans make large groups of mirror satellites or large shields that sho