The Near-Infrared Spectrograph passed initial checkouts amid the observatory's mirror alignment activities.
from targets that Webb observes into what scientists call spectra, measuring the amount of light with specific wavelengths. This fingerprint can teach astronomers about galaxies, exoplanets and other objects, shedding light on properties such as mass, temperature and chemical composition. at the same time, making observations much more efficient since collecting the light photons from such distant objects will take the observatory hundreds of hours.
Here is how the instrument will work: The grating wheel spreads light from a target of interest into its colors to make a spectrum. The filter wheel reduces contamination by blocking wavelengths outside of what scientists are interested in looking at. Then the refocus mechanism will adjust and sharpen NIRSpec's focus.
"At each position, we recorded a set of reference data," NIRSpec officials wrote."This data showed us how well the wheel was moving, and how accurately it settled into each position. Between each ... position, we downloaded 'high-capacity buffer' data from the positioning sensors, and the NIRSpec team analyzed the data. The data showed that the wheel moved very well even in the first attempt.
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