Only then would events on earth lie in the future light cone of the event at which the sun went out.

They are defined by the set of light cones (see the image on the left).

But we cannot receive signals from those parties and places outside our past light cone.

The center of the light cone is the event.

It's also used in the light cone gauge of string theory.

The place was lit by a single green-tinged light cone.

The first plant he looked at had a number of light cones, each looking suitable for ice cream.

Events can be causally related only if they are within each other's light cones.

The origin and all events on the light cone are self-orthogonal.

See also light cone gauge (that is usually imposed simultaneously).

Elsewhere is the region between the two light cones.

The top of the light cone tells where the light from the event will travel.

Another definition is that the light cone represents all possible worldlines.

A similar process led to the construction of the light cone as a characteristic surface for the wave equation.

A more significant notion is absolute future or the future light cone.

A good illustration of this principle is the Light cone:

They couldn't have learned it by getting signals, because they were not in communication with our past light cone before.

In special relativity the past is considered as absolute past or Light cone.

Past Light Cones continue to exist and you may only travel their edges.

Not to be confused with the Light cone.

There the asymptotes of the unit hyperbola form a light cone.

The light cone stabbed beyond the tenuous tree tops.

Remark: The nonholonomic construction is actually in accordance with the local light cone structure.

For example, a light cone is a null hypersurface.

The set is the full future light cone at , including the cone itself.