The space between words is a quiet gap having an interval of five dots in length. It is not possible to send consecutive spaces in Morse code, there must always be a "word" between spaces.
Every particle has empty space or voids between each other called intermolecular or interparticle spaces......
The plural of space is spaces e.g. there were several spaces left on the bus
The star's chemical composition; the star's rotation; pulsations of the star; planets or other invisible objects moving around the star; how quickly the star is moving towards us or away from us.
Spaces
Intercostal spaces
The spaces between leaf veins are called areoles or areolae.
pore spaces
the spaces between the teeth of a comb are called umpernaters :) that's their scientific name.
cementation
The tufted vertical ridges are called wales. The apparent "spaces" between the wales are actually the base fabric called the ground (which can be plain or twill).
If the spaces have been inserted between the letters it is called kerning. If the spaces are put between paragraphs or other elements it is simply called formatting (layout).
Stroma
nucleoplasm.
What is outside the cell
These are called the Interstitial Spaces.
Groundwater fills spaces between particles of soil.