Is there atmosphere in space in space?

Space isn't a complete vacuum as we are sometimes taught in school. But it doesn't necessarily have an "atmosphere" though there is the solar wind. Streaming particles from our sun that reach out to even the Voyager 2 spacecraft. What deep space beyond the sun's influence consists of is probably a mix of solar winds and possibly some sort of Dark Matter holding the galaxy together. Beyond the galaxy it is believed that Dark Energy pushes the galaxies further and further away.