Hubble’s relation is used to express the distance between an observer and the receding velocity. In a plot of the recession velocity and the distance from the observer, the fraction of the velocity and the distance, when expressed as a ratio, represents the Hubble constant. The Hubble constant is expressed by H 0, and can be used in the measurement of the expansion rate, size, as well as the age of the universe (Jackson 23). Research and analysis in cosmology has showed that the universe experiences significant expansion, which is uniform and can be estimated by considering the relationship between ‘the recession velocity of a galaxy’ denoted by v , and the estimated distance between the observer and the galaxy, d . Based on the Hubble law, the recession velocity is a product of the Hubble constant and the estimated distance. Hence; v = H 0 d . Thus, the Hubble constant plays a significant role in astronomy. The focus of this paper is on establishing the accuracy of the value of the Hubble constant in relation to a review of a paper authored by Freedman et al., (2001), entitled “Final results from the Hubble space telescope key project to measure the Hubble constant”. The estimation of the Hubble constant by astronomers has been a subject of concern among researchers for a long time. While it is easy to measure the redshift for a galaxy, measuring the distance required to estimate the Hubble constant is very hard. However, to estimate the Hubble constant accurately, astronomers should not make use of galaxies that are near the Milky Way because the presence of gravitational force affects their general expansion and would thus not give accurate and reliable findings (Kennicutt 1476). In addition, galaxies that exist in a cluster or as a group are not advisable for inclusion since they have approximately the same distance. After the galaxy redshift and the distance have been identified, the slope in a graph of all the galaxies gives the Hubble relationship, with the Hubble Constant being depicted by the line of best fit in the Hubble relation. According to Freedman et al. (47), there are several applications of Hubble constant in the day to day activities. For example, the age of the universe can be expressed by the inverse of the Hubble constant, H 0 -1, while the size of the observable universe can be expressed in terms of R obs = ct o. However, such a relationship is only possible in a case where the universe’s total energy density is known. A square of the Hubble constant can be used to relate the geometry of the universe with its total energy density. Additionally, the Hubble constant can be used in defining the universe’s critical density, which can be expressed in the form of an equation, as showed below. ᵖ crit = (3H2)/ (8πG) Evidently, the Hubble constant finds a lot of use in many areas. Freedman et al. (47) noted that the constant could be used to determine numerous aspects of quasars and galaxies such as energy density, luminosity, and mass, among other physical properties. Freedman et al. (47) highlighted that ‘The building of the NASA/ESA Hubble Space Telescope ( HST )’ was motivated by the need to accurately measure the value of the Hubble constant. The Hubble Space Telescope commissioned several projects in the eighties, including the one targeting 10% accuracy in the Hubble constant. The primary aim of the Hubble Key Project was to accurately get the measurement of the Hubble constant in relation to m