In the Science Assignment Directorate, the Astrophysics division contemplates the universe. The science objectives of the Astrophysics Dissection are stunning. we try to comprehend the world and our place in it. We are underpinning to research the exact instantaneous of invention of the universe and are near learning the full history of stars and worlds. We are result how environmental frameworks erection and how conditions accommodating forever create. Also, we will investigation for the mark of life on different universes, maybe to appreciate that we are not the only one. Astronomy embraces three engaged and two cross-cutting projects. These promised projects give a scholarly structure to propelling science and directing key arranging. New time‐resolved optical surveys will produce well‐sampled light curves for many thousands of QSOs. We explore the potential of stacking samples to produce composite cross‐correlations for groups of objects that have well‐sampled continuum light curves, but only a few (∼2) emission‐line measurements. This technique exploits current and future wide‐field optical monitoring surveys [e.g. Pan‐STARRS, Large Synoptic Survey Telescope (LSST)] and the multiplexing capability of multi‐object