Webb telescope 'fingerprints' earliest galaxies
The significance is not lost on the University of Hertfordshire, UK, astronomer.
Indeed, the US space agency Nasa's recently launched Webb observatory has been given the primary objective of finding the very first stars to light up the cosmos.This is where a hand goes up to ask: But weren't there reports over the Summer of Webb observations that are even more distant than JADES-GS-z13-0?
To get the best measure, astronomers prefer to use spectroscopy, a more detailed technique in which the light signal is split up into its component wavelengths. This is difficult work all round. The targets appear extremely faint even to Webb and its giant, 6.5m-wide mirror. The new space telescope carries an incredibly powerful near-infrared spectrometer provided by the European Space Agency. It's NIRSpec's job to do the detailed analysis of the faint light signals.
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