wrote ...
Szczepan Bialek wrote:

But in antennas charge appears and disappears. Electric waves must
appear.
Some Authors call them electrostatic waves.

Complete nonsense.

"Waves in plasmas can be classified as electromagnetic or electrostatic
according to whether or not there is an oscillating magnetic field. Applying
Faraday's law of induction to plane waves, we find , implying that an
electrostatic wave must be purely longitudinal. An electromagnetic wave, in
contrast, must have a transverse component, but may also be partially
longitudinal. From: http://en.wikipedia.org/wiki/Waves_in_plasmas

In space is the rare plasma + dust.
S*