Hubble direct and grism observations

This Hubble ACS photo (left) shows some of the most distant galaxies ever imaged by humankind. Viewing the same galaxies through a grism (right) splits the light up revealing the distribution of brightness and colour in the stars. This allows scientists to deduce facts about their chemical composition and distance from Earth. Artist Tim Otto Roth has used data from ACS grism studies of these galaxies to produce a dazzling laser installation, projected onto Venice’s Palazzo Franchetti.