Recent content by timbreman

Ok so the difference between the two varying sets of spectral lines in each chart is the shift. I get that. But comparing the redshift from a distant galaxy compared to our own sun as a point of reference doesn't seem applicable. We don't know what type of wavelength the light started out as...

I don't quite understand this answer. The wiki article says they compare the spectral lines and compare the shift in wavelengths. So what wavelength of light are they using as a baseline? How do they know what type of light the star emitted "before" going thru millions of years of travel and...

I am very interested in physics but have no background education on it so forgive me if this question is amateur. I am trying to grasp this redshift thing. It's the measurement of a shift in the wavelength of light. The only variable I can think of is the wavelength of the light received on...