At present, people think that the most expensive substance in the world is Andromeda meteorite. Antimatter is the opposite of ordinary matter, that is, antiparticles of protons, neutrons and electrons. When it collides with ordinary matter, it will produce a strong explosion. Andromeda is considered as one of the most expensive substances in the world, because its production requires extreme conditions and high-capacity equipment, and it is easily destroyed and releases a lot of energy.

At present, scientists are studying how to make and store a very small amount of Andromeda and use Andromeda to carry out scientific experiments such as high-energy particle accelerators. In addition, in some science fiction novels or movies, Andromeda is used as the energy source to drive the ftl spacecraft and so on.