when was the last time in history that Pluto was at a 90 degrees angle to Saturn?

this sounds like an astrology question. is it?

you make it sound like this is a rare event. it isn't. saturn was 90 degrees west of pluto in 1994. it will be 90 degrees east of pluto in 2010. this happens twice each saturnian year.

i'll let you do your own numbers for uranus.
 
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