Hidden science assumptions 11-07-23

From Peter Woit’s The Hype Goes On:

Aaron Sheldon Says:
April 24th, 2006 at 6:48 pm Um…Is our knowledge of red-shift nearly anywhere as reliable as our knowledge of labratory H2 absorbtion lines? Isn’t it a bit like comparing apples to oranges?I mean, we measure red-shift by assuming the relationship between spectral lines remains constant. But [...]