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 Must Be a Reason Why "Must Be A Reason Why" is a song by American MC J. Pearl, released as a single in the United Kingdom on August 2, 2011 and in other European countries on October 3, 2011. The single features vocals from British singer Shayne Ward. "Must Be A Reason Why" was produced by Lucas Secon, and was written by Secon, Chris Brann and Mintman. The song samples Wamdue Project's 1997 dance track, "King of My Castle". The track was originally recorded with Ward as the main artist, and J. Pearl being credited as the featured vocalist, and