
The above image appears to show the simultaneous spectra of 221 stars, so what’s new, even Siding Springs near Coonabarabran can do that.
What’s new is that these are 221 distant galaxies, not stars. Which is pretty amazing. Redshift and more.
Taken by the Visible MultiObject Spectrograph (VIMOS) operating at the Very Large Telescope (VLT) array in Chile. Exposure time 900 seconds. “This marvellous science machine has been installed at the 8.2-m MELIPAL telescope, the third unit of the Very Large Telescope (VLT) at the ESO Paranal Observatory.”
https://www.eso.org/public/news/eso0209/
https://www.eso.org/public/images/eso0209b/
https://apod.nasa.gov/apod/ap200920.html