STScI . Research . ... The 8.4m ground-based Large Synoptic Survey Telescope will survey the entire visible sky deeply in multiple colors every week probing dark matter and dark energy, searching for supernovae, near-Earth asteroids and Kuiper-belt Objects. ... GRAPES is an ACS grism spectroscopic survey of the Hubble Ultra Deep Field. ... The Hubble Deep Field is a Director's Discretionary program on HST to image a typical field at high galactic latitude in four wavelengths as deeply as possible. ...