Vacuum , or on a larger scale a void.
Light and other electromagnetic wavesGravity wavesNeutrinos
it is called white space and should be 20-30% in a page
a vacuum
Radiation.
The empty space in a container is referred to as "void space" or "headspace". It is the area within a container that is not filled with the product.
The transfer of heat energy through empty space is called radiation.
A region empty of matter is called a vacuum. It is a space devoid of particles, atoms, and molecules.
"radiation"
Conduction
Venus
vacuum
Radiation.