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.
For a distance of about 18km above the tropopause, there is a layer called the stratosphere. In this layer, the pressure continues to decrease, but the temperature increases gradually to 0C. Like the troposphere, the stratosphere also varies in thickness. It is quite deep over the poles and thinner over the equator. The stratosphere contains a layer of ozone which absorbs the Sun's ultraviolet rays, protecting life on the earth's surface. The top layer of the stratosphere is called the stratopause.