After the telescope launched, got in position and unfolded itself - "the six-month unwrapping of the Christmas present", Rigby says - her job shifted to characterizing how well the telescope works. Early in July, Rigby became the senior project scientist for JWST; it's her job to figure out how to get the most and best science out of the telescope. Features ESSAY O ne of a telescope operator's primary jobs is to keep any stray light out of the instrument. Since then, Rigby has used many major telescopes, from those at the Keck Observatory in Hawaii to the Magellan telescopes in Chile to the Spitzer and Hubble space telescopes. [Extracted from the article]