3C 273 was the first quasar identified (1963). When we look at its chemical spectrum, we see that its hydrogen alpha emission line (Hα) has an observed wavelength of λobs = 759 nm. -(By comparing the observed wavelength of Hα with the rest-frame (source) wavelength, find 3C 273’s redshift, z. - How fast is 3C 273 moving away from us in km/s? -Assuming the value of Hubble constant listed in the table at the top of the page, how far away is 3C 273 in Mpc? This was, at the time, the most distant object in the known universe! answer to three significant figures

3C 273 was the first quasar identified (1963). When we look at its chemical spectrum, we see that its hydrogen alpha emission line (Hα) has an observed wavelength of λobs = 759 nm. -(By comparing the observed wavelength of Hα with the rest-frame (source) wavelength, find 3C 273’s redshift, z. - How fast is 3C 273 moving away from us in km/s? -Assuming the value of Hubble constant listed in the table at the top of the page, how far away is 3C 273 in Mpc? This was, at the time, the most distant object in the known universe! answer to three significant figures