The three dimensions of space and the dimension of time come together under the general theory of relativity to create space-time. Events take place on a point in space-time.
Space-time Term Timeline in A Brief History of Time
The timeline below shows where the term Space-time appears in A Brief History of Time. The colored dots and icons indicate which themes are associated with that appearance.
...by multiplying half the distance of the round trip by the speed of light. A space-time diagram, can be used by different observers moving at different speeds, and no measurement is... (full context)
...coordinates: three in space, and the fourth in time. These can all be arbitrary. In space-time, there is no distinction between space and time coordinates, like there's no difference between space... (full context)
...the surface of the earth, because any point can be determined by latitude and longitude. Space-time diagrams can show time increasing on one axis, and one dimension of space on the... (full context)
In general relativity, objects take a straight route in curved, four-dimensional space-time, but seem to take curved routes in three-dimensional space. For example, an airplane flying straight... (full context)
...thinking has changed considerably. Space and time are affected by objects' movement and forces, and space-time in turn affects the movement of those forces and objects. Just as space and time... (full context)
...in his day. Essentially, his work states that stars’ gravitational pull changes light’s path through space-time. Finally, the light is pulled so strongly, it cannot escape. As light moves faster than... (full context)
General relativity states that moving objects give off gravitational waves, which bend space-time. These waves carry energy away from the object producing them. Slowly, these objects lose energy... (full context)
...imaginary numbers to represent time, which clears away any difference between space and time. Euclidean space-time (so-called after Euclid, the Ancient Greek who founded two-dimensional geometric studies) is four-dimensional, but really... (full context)
...theory of quantum mechanics and general relativity is that gravity is represented in a curved space-time. Applying the sum over histories to Einstein’s ideas on gravity, the history of a particle... (full context)
...speed of light, however, and rockets cannot get enough power to achieve this speed. Perhaps space-time could be warped to allow a shortcut, allowing a wormhole between two regions; this would... (full context)
...past. One explanation is called the consistent histories approach, which says everything that happens in space-time must be consistent according to the laws of physics. This means you would only travel... (full context)
...purposefully prevent large-scale time travel. But this has not been proven. The idea goes, when space-time is warped enough to allow time travel, virtual particles moving in closed loops become real... (full context)
...the different dimensions. In 1994, scientists discovered dualities, which produce the same effects in four-dimensional space-time from various configurations. They also found p-branes, which take up two or more dimensions in... (full context)