The outer boundary of the heliosphere. The region where the Solar Wind slows and stops, as it collides and merges with the interstellar medium. Of unknown size, but thought to be about 100 Astronomical Units from the Sun (historically, has been presumed to be about twice as far out as the furthest proven extent of the Solar Wind).
The region in space where the Sun's atmosphere merges with interstellar space. The position of the heliopause depends both on the strength of the solar wind and on the properties of the local interstellar medium. Note also that data from Ulysses during solar minimum have shown that the solar wind from the Sun's poles has a higher speed than the speed in the ecliptic, so then the heliopause should be further from the Sun in the polar direction.
the boundary between the solar system and interstellar space.
The boundary theorized to be roughly circular or teardrop-shaped, marking the edge of the Sun's influence, perhaps 100 AU from the Sun.
The outer edge of the heliosphere, where the solar wind runs into the interstellar medium. At the heliopause, the pressure of the solar wind balances that of the interstellar medium.
The boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind and the wind from other stars meet.
The point at which the solar wind meets the interstellar medium or solar wind from other stars.
The heliopause is the boundary of the heliosphere of the Sun in which the solar wind's density decreases greatly (and its speed also declines). The location of this transition region is unknown, but must be at more than 50 AU from the Sun.
In astronomy, the heliopause is the boundary where the Sun's solar wind is stopped by the interstellar medium.
