Space bean is a tiny spherical object, which is usually used to test and demonstrate physical phenomena in microgravity environment. According to NASA, the diameter of space beans is usually between 1mm and 3mm, and the smallest space bean is1mm. This tiny space bean can be operated and observed by microgravity laboratory or other space experimental equipment.

The research and application fields of space beans are very extensive, including physics, chemistry, biology and other fields.