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#NASAWebb will be excellent at detecting biosignatures in white dwarf planet atmospheres. "...impressively, Webb could detect gas combinations potentially indicating biological activity on such a world in as few as 25 transits [across its star.]." That's 2 days of observing time!https://twitter.com/NASAUniverse/status/1306254799738863617 …
Note that for the simulated #NASAWebb observations, scientists supposed that an Earth-size planet were located within the range of orbital distances around WD 1856 where water could exist on its surface. Read more:https://www.nasa.gov/press-release/nasa-missions-spy-first-possible-survivor-planet-hugging-white-dwarf-star …
We asked Ryan MacDonald, one of the co-authors on the ApJL article for an answer to this. Here's what he said: (1/2)
Could the new James Webb telescope 
discover intelligent life on
Sol 3 
Good luck 
If the rocket doesn't blow up
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