Question

what is an heliopause? and discribe it?
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Answer 1

Heliopause is the outer edge of the heliosphere which acts as the surface of the bubble that surrounds our solar system. The Heliopause is that part of the solar system which is exposed to particles and ions of deep space.

Answer 2

Answer:

Definition: Heliopause is the outer edge of the heliosphere which acts as the surface of the bubble that surrounds our solar system. The Heliopause is that part of the solar system which is exposed to particles and ions of deep space.

Description: Heliopause is the boundary of the heliosphere which is the spherical region around the Sun. It is filled with solar magnetic fields and solar wind that consists of protons and electrons. The Heliosheath lies closer to the Sun than the heliosphere and it is a region of transition where the wind is at subsonic speed. Subsonic speed means that the wind speed is slower than the speed of the disturbances that travel through the interstellar medium.

The Heliopause is at a distance of about 123 astronomical units (AU; 18 billion km [11 billion miles]) away from the Sun. The shape of the Heliopause is ever fluctuating and is mostly influenced by the Sun's motion through space that leads to a disturbance in the wind of interstellar gas.

The orbit of the Earth and all the other planets lie within the Heliopause. Voyager 1 that was launched in 1977 and reached it in 2012, is the only spacecraft to cross the Heliopause. Voyager 1 discovered the location of the Heliopause when it observed an increase in cosmic-ray particles and detected that radio emissions are generated when material thrown off by the Sun in mass ejections crosses it.

The Heliopause is thus, a theoretical boundary where the interstellar medium stops the Sun's solar wind because they are not strong enough to throw away or push the interstellar winds of the stars surrounding it. The crossing of the Heliopause is signaled by a sharp drop in the temperature of the charged particles.

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