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.
Technically the thermosphere is the layer between the mesopshere and the exosphere. the exosphere is the highest layer in the 5 layers of atmosphere. The exosphere temperature â¦ ranges are between 300 degrees to 1700 degrees Celsius, and also it contains hydrogen and helium.Now, facts about the mesosphere.it's the layer within the Earth's atmosphere that extends from about 50 to 85 km (31 to 53 mi) above the surface. The mesosphere is predominantly characterized by its thermal structure. On average, mesospheric temperature decreases with increasing height. Stratosphere: The Layer of the Atmosphere That Shields Against Ultraviolet Rays The stratosphere is a layer of the atmosphere that is often little understood outside scientific circles, though it has entered common usage through the adjective stratospheâ¦.