When possible, two scientific instruments are used simultaneously to observe adjacent target regions of the sky. (stsci.edu)
Secondly, most globular clusters contain more than four blue horizontal - branch stars, so other stars of this type should in time be found in regions of the sky adjoining the area that has been searched by the astronomers. (newscientist.com)
They will stare at a particular region of the sky for between 27 and 351 days each, before moving on to another area. (space.com)