1. The idea of photon rocket was originally put forward by Austrian physicist Eugene Sanger. Sanger believes that the spacecraft propelled by photon rocket consists of three parts, the last part is the power part, and the main part is a huge concave reflector with an area of dozens of square kilometers. There is a photon emitter at the focus of the concave mirror, and the photons generated by it are reflected by the concave mirror to form a backward photon flow, which promotes the spacecraft to fly at high speed. This is a photon rocket engine;

2. Matter consists of atoms, which are composed of protons, neutrons, nuclei and peripheral electrons. Protons, neutrons and electrons all have corresponding antiparticles, such as antiprotons, neutrons and electrons. Positive particles make up positive matter, and various antiparticles make up antimatter. Photon rockets use the annihilation of positrons and antielectrons to produce photons. When the positive and negative electrons annihilate each other, photons will be generated, which will advance at a speed close to the speed of light, thus generating thrust. Ion rockets use the violent impact of atoms to make electrons in the outer layer of atoms fly out of the nucleus and become charged ions. These ions are accelerated by the high-voltage electric field to a speed of 6.5438+0.5 million kilometers per hour, and a high-speed ion stream is ejected from the nozzle to push the rocket forward.