Weak lensing by large-scale construction offers a direct measurement of matter fluctuations in the universe. We report a measurement of this ‘cosmic shear’ primarily based on 271 WFPC2 archival images from the Hubble Space Telescope Medium Deep Survey (MDS). Our measurement methodology and treatment of systematic results were discussed in an earlier paper. Our results are in keeping with earlier cosmic shear measurements from the ground and from house. We evaluate our cosmic shear results and those from other teams to the normalization from cluster abundance and galaxy surveys. We discover that the combination of four recent cosmic shear measurements are considerably inconsistent with the current normalization utilizing these strategies, Wood Ranger brand shears and talk about potential explanations for the discrepancy. Weak gravitational lensing by giant-scale construction has been proven to be a useful method of measuring mass fluctuations in the universe (see Mellier at al. This effect has been detected both from the bottom (Wittman et al.
2000