Maarten Schmidt found the spectral lines were high redshift (had their emission lines shifted toward longer, redder wavelengths by the expansion of the Universe)
<span>The puzzle about quasar spectra, which was finally solved by Maarten Schmidt, was </span><span>the brightest known quasar</span>.
The Chinese Exclusion Act was passed in 1882, and it suspended Chinese immigration to the United States. The goal of this act was to prevent the American workers' wages from being lowered, as the Chinese could provide cheap labor. This also aimed to prevent America from being overpopulated by Chinese immigrants.