A stroll through space in Fairbanks It is a pleasant day for a walk in the middle of Alaska, with blue sky overhead, and people perhaps looking for something to do outside, with lots of space and sweet-scented summer air around them. Not long ago, I hiked the length of a new planet-walk display on the University of Alaska Fairbanks campus with Peter Delamere. In a little less than one mile, we spanned the relative distance from the sun to dwarf planet Pluto. Delamere is a researcher and teacher at UAF’s Geophysical Institute and Physics Department. He knows a lot about each of the heavenly spheres mounted on signs along Yukon Drive, which is arrow-straight and runs up to the high point of the campus. I have known Pete for a long time. When he was a Ph.D. student here in the 1990s, I interviewed him for this column about…