Propellant tank for spacecraft and spacecraft

A propellant tank for a spacecraft, the propellant tank being operable to discharge propellant to an engine by pressurizing an inside of the propellant tank with operating gas, the propellant tank comprising:

• a tank body;
• a holding container provided inside the tank body and disposed with a predetermined gap from an inner wall of the tank body, wherein the holding container is configured to hold the propellant in a liquid state when the inside of the tank body is in a zero-gravity state;
• and
• a reservoir container provided in the holding container on a discharge side of the tank body, the reservoir container being configured to hold the propellant in the liquid state,
• wherein the holding container and the reservoir container are formed of a mesh material having a mesh pattern,
• wherein surface tension of the propellant, in the liquid state, acts on the mesh material of the holding container, and
• wherein, when the inside of the tank body is in a zero-gravity state and is not pressurized by the operating gas, passage through the holding container of the propellant suspended in the holding container is suppressed due to the surface tension of the propellant in the liquid state so that the propellant in the liquid state will be held in the holding container.