600 light-years is 37,944,646.2 AU
1 AU = 0.0000158 light-years
16 light years is 1,011,834.75 AU (Astronomical Units).
2.25 AU
They really are not comparable. Light travels 186,000 miles per second, and one AU is about 8.3 light-MINUTES. You can probably do the math, from minutes to hours to days to years as well as I can. Or, you could google "1000 light years in AU" and get the answer
1 light year is approximately 63,241 AU. Therefore, 4.7 light years is about 297,116 AU.
5.5 light years equates to 347,818.194 AU (Astronomical Units).
35.2 AU = roughly 0.000557 light-year (rounded)
Saturn is approximately 9.5 AU from the sun, which is about 0.00015 light years.
The Milky Way is estimated to be about 2,000 light years thick, but about 100,000 light years long/far... Which i guess you can tell, thats a lot.
Eris varies in distance from the sun between about 38 and 98 AU, which works out to 0.0006 and 0.0015 light years. In other words, much less than a light year.
Its around 600 light years away from our own solar system. In terms of distance from its own central star, Keplar-22, it is around 0.85 AU, where 1 AU is the Earth to sun distance (so around 80 million miles).
Voyager 1 was able to perform measurements and establish the distance as 121 AU (18 billion km). This would make the distance about 0.0019 light years.