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
Love Must Be Tough to Rock 'n Roll)". In October 2008 "Love Must Be Tough" was named Record of the Year by Hi-Fi+ Magazine. "It's an even year, so it must be an Eleanor McEvoy album that's up for an award. Following in the footsteps of "Yola" and "Out There", this year's offering from the Irish chanteuse, "Love Must Be Tough", excels even the exalted standards set by its predecessors. What started out as a collection of covers, songs she wanted to sing from a woman's perspective, rather than in their more normal male voice, soon grew into something more - much, much more."