Space (physics) facts for kids
Space, in everyday language, is something that we all know. It is measured in the three dimensions of distance: length, width, and height.
In modern physics, space is a "boundless four-dimensional continuum" known as space-time. Scientists disagree about whether or not it is an entity (something that actually exists). Some think it is an entity while others think it is just a relationship between entities.
The standard space interval, called a meter (or metre), is defined as the distance traveled by light in a vacuum during a time interval of about 1/300,000,000 of a second.
Before Einstein's work on relativistic physics (how something looks based on the position of the person seeing it), scientists thought time and space did not depend on each other. Einstein's discoveries have shown that due to the relativity of motion, space and time can be mathematically combined into space-time.
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See also
In Spanish: Espacio (física) para niños
