Depending on the definition, a high-velocity star is a star moving faster than 65 km/s to 100 km/s relative to the average motion of the stars in the Sun's neighbourhood. The velocity is also sometimes defined as supersonic relative to the surrounding interstellar medium.
Making the world better, one answer at a time. The temperature changes within the stratosphere with increasing distance from the earth. The temperature increases with altitude, reaching a maximum of about 2 degrees Celsius This is unlike the troposphere, where the temperature decreases with increasing altitude.n the stratosphere, the temperature increas â¦ es with height due to absorption of radiation by ozone. Temperature changes when altitude is in the stratosphere because of  one things. It already rises when you climb up in the stratosphere.
Luckily for us most of them above the ultra-violet frequency are blocked by the molecules of air and, in the statosphere, of ozone. The variation of temperature through the troposphere, the place where we live, is simple: as the pressure is less with altitude, moving air cools down by adiabatic effect. But, starting from the stratosphere, the air gets so thin that some cosmic rays in the higher frequency range warms up the very few molecules since the distance between the is much greater. Note that, to start with, the stratosphere sees a pretty constant temperature with higher altitude. Then it increases. But it is the stop in decrease that prevents clouds and resulting winds to enter the stratosphere and makes the tropopause the ceiling of our weather.