The heliosphere is a kind of pressure bubble blown by a supersonic wind of electrically charged particles streaming from the solar atmosphere.

"A supersonic wind shear?"

In the mid-1950s Parker developed the theory on the supersonic solar wind and predicted the Parker spiral shape of the solar magnetic field in the outer solar system.

A second possibility, scientists said, is that the X-rays were being produced from violent collisions between the comet's atmosphere and the supersonic "wind" of particles and electrified gases known as plasma streaming out from the Sun.

In one model, Dr. Simpson said, the encounter between the supersonic solar wind and the inrushing interstellar gas could create a strong shock wave.

Dark, cold and whipped by supersonic winds, Neptune is the last of the hydrogen and helium gas giants in our solar system.

At some distance from the Sun, the supersonic solar wind will be held back from further expansion by the interstellar wind.

The desent curve began Met bumpy, vexatious supersonic winds were f ;beginning to bite.

That's more than enough to take a hurricane over the line into supersonic winds, if our estimates are right.

At some distance from the Sun, well beyond the orbit of Neptune, this supersonic wind must slow down to meet the gases in the interstellar medium.