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.
In this region of the atmosphere is the ozone layer, which absorbs most of the harmful ultraviolet radiation from the Sun. The temperature increases slightly with altitude in the stratosphere. The highest temperature in this region is about 32 degrees Fahrenheit or 0 degrees Celsius. Mesosphere: The mesosphere is above the stratosphere. Here the atmosphere is very rarefied, that is, thin, and the temperature is decreasing with altitude, about â130 Fahrenheit (-90 Celsius) at the top. Thermosphere: The thermosphere starts at about 55 kilometers.