ESO Headquarters, Garching, Germany 22-26 November, 2021
Due to the difficult circumstances due to the COVID-19 pandemic, the LOC and SOC agreed to postpone this conference to 2021. It will be held as planned at ESO Headquarters. The organisers have studied the possibility of going ahead with an online meeting, but this would have been very detrimental to one of the main goals, which is to foster discussions and collaborations between members of the four different communities (Galactic, extra-galactic, high-z and theory).