These spectra, some of which are being projected to the facade, can be analysed to yield a wealth of information about objects that are so far away and so faint that they will not reveal their secrets in any other way available to astronomers at present time. In many cases, these observations provide a measure of the distance to the object which tells us that we are looking into the very distant past.
In molti casi, queste osservazioni consentono di misurare la distanza degli oggetti e ci dicono che stiamo osservando in un lontanissimo passato.