Watch how Hubble Telescope used a lunar eclipse for detecting life on exoplanets – Boing Boing

During the January 2019 total lunar eclipse, astronomers trained the Hubble Telescope on our moon in order to calibrate how future telescopes will look for possible life on exoplanets by measuring ozone levels.
Via NASA:
Though numerous ground-based observations of this kind have been done previously, this is the first time a total lunar eclipse was captured at ultraviolet wavelengths and from a space telescope. Hubble detected the strong spectral fingerprint of ozone, which absorbs some of th…

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