The New Mexico Exoplanet Spectroscopic Survey Instrument (NESSI) will soon get its first "taste" of exoplanets, helping astronomers decipher their chemical composition.

NESSI got its first peek at the sky on April 3, 2014. It looked at Pollux, a star in the Gemini constellation, and Arcturus, in the Boötes constellation, confirming that all modes of the instrument are working.

"After five years of development, it's really exciting to turn on our instrument and see its first light," said Michele Creech-Eakman, the principal investigator of the project at the New Mexico Institute of Mining and Technology in Socorro, N.M. "Planet hunters have found thousands of exoplanets, but what do we know about them? NESSI will help us find out more about their atmospheres and compositions."

Partly funded by NASA's EPSCoR (Experimental Program to Stimulate Competitive Research), in partnership with the New Mexico Institute of Mining and Technology, the NESSI instrument is located on the institute's 2.4-meter Magdalena Ridge Observatory in Socorro County, N.M.

NESSI will focus on about 100 exoplanets, ranging from massive versions of Earth, called super-Earths, to scorching gas giants known as "hot Jupiters." All of the instrument's targets orbit closely to their stars. Future space telescopes will use similar technology to probe planets more akin to Earth, searching for signs of habitable environments and even life itself.