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.
At the top of the troposphere is a thin layer called the tropopause. Temperature in the tropopause does not change with height. This means that the cooler, denser air of the troposphere is trapped beneath the warmer, less dense air of the stratosphere. layer of ozone molecules absorbs solar radiation, which heats the stratosphere. Unlike in the troposphere, air in the stratosphere is stable because warmer, less dense air sits over cooler, denser air. As a result, there is little mixing of air within the layer.