What is another word for heliopause?
Pronunciation: [hˈɛlɪˌɒpɔːz] (IPA) 
The heliopause is the point in space where the sun's influence ends and interstellar space begins. There are several different words that can be used as synonyms for heliopause. For example, some people refer to it as the solar boundary, while others may call it the heliosphere boundary or the solar wind termination shock. Another term that is sometimes used is the heliopause boundary layer. Each of these terms describes the same phenomenon, which marks the point where the sun's magnetic field and solar wind are no longer strong enough to push back against the incoming particles from interstellar space. Regardless of what it's called, the heliopause represents an important boundary in our solar system.
