فضانورد

The strength and vitality required for sustained physical or mental activity.

Science, knowledge.

The physical substance of which something is composed.

Strength or power; an influence tending to change the motion of a body.

Sciences, branches of knowledge.

Planet.

A scientific procedure undertaken to make a discovery.

A room or building used for scientific research, experiments, or testing.

Chemist; an expert in chemistry.

Discovery.