The nominal aim of the GALAH survey is a sample of one million stars. The main observing programme started on 7 February 2014 and up to the night of 18 July 2021 we have acquired 811661 spectra from 731166 stars. This page presents the observing progress of the GALAH survey.


Fields observed

Location on the sky of all the fields observed as part of the GALAH Survey. Location on the sky of all the fields observed as part of the GALAH Survey. Each small circle represents a possible field, with those highlighted having been observed. Fields from other programs are omitted for visual clarity.


Number of stars observed

Cumulative sum with time for the number of spectra and the number of stars. GALAH has acquired 811661 spectra from 731166 stars. The cumulative sum with time for the number of spectra and the number of stars. Unflagged refers to those targets where there is no problem noted with the reduction. The vertical grey stripes indicate observing nights.


The cumulative sum of spectra acquired for each sub-survey. The GALAH survey consists of three main surveys: GALAH, K2-HERMES, and TESS-HERMES. There was also a smaller program dedicated to open clusters. The cumulative sum of spectra acquired for each sub-survey.


Observing time

The cumulative sum of total shutter-open time used by the GALAH Survey. The cumulative sum of total shutter-open time used by the GALAH Survey. The vertical grey stripes indicate observing nights.