Radial velocity Radial velocity The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point. That is, the radial velocity is the component of the object's velocity that points in the direction of the radius connecting the object and the point. In astronomy, the point is usually taken to be the observer on Earth, so the radial velocity then denotes the speed with which the object moves away from or approaches the Earth. In astronomy, radial velocity is often measured to the first order of approximation by
Must Be a Reason Why music video for "Must Be A Reason Why" was shot at Portland Place, London, and directed by director Andy Hylton. It premiered on June 15, 2011, via Simply Delicious' YouTube account, at a total length of two minutes and forty seconds. The video consists of Pearl and Ward searching for each other in a nightclub, and performing the song amongst the crowd. The video received its first television aiplay on Starz on Friday, June 17, 2011. Must Be a Reason Why "Must Be A Reason Why" is a song by American MC J. Pearl, released as a single in the