What angular resolution would be required to distinguish features the size of the Earths orbit (such as features in a protoplanetary disk) at a distance of 5 pc (16 light-years), assuming that the telescope being used had sufficient sensitivity to detect them?

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

1 Answer

0 votes
About 0.2 arc seconds, well within the resolution limit of the Hubble Space Telescope.
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)



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