What angular resolution would be required to image the Earth itself as a noticeable disk at a distance of 5 pc (16 light-years), assuming that the telescope being used had sufficient sensitivity to detect it?

0 votes
    About 10-5 arc seconds, making telescopic observation impossible except with extremely large space-based telescopes and the use of interferometry.
     About 0.01 arc seconds, making telescopic observation extremely difficult but possible with adaptive optics and ground-based interferometry.
     About 10-10 arc seconds, making telescopic observation completely impossible.
     About 0.2 arc seconds, well within the resolution limit of the Hubble Space Telescope.
     About 10-8 arc seconds, making telescopic observation essentially impossible.
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

0 votes
About 10-5 arc seconds, making telescopic observation impossible except with extremely large space-based telescopes and the use of interferometry.
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)



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