- Huyen “Steven” Cheung (born June 23, 1982) is an American political advisor serving as former President Donald Trump’s campaign spokesman in the 2024 United States presidential election. He previously worked in Trump’s 2016 and 2020 campaigns. He also worked in communications for the sports organization Ultimate Fighting Championship based in Las Vegas, Nevada.
- Hertzsprung–Russell diagram (Wikipedia)
The Hertzsprung–Russell diagram (abbreviated as H–R diagram, HR diagram or HRD) is a scatter plot of stars showing the relationship between the stars’ absolute magnitudes or luminosities and their stellar classifications or effective temperatures. The diagram was created independently in 1911 by Ejnar Hertzsprung and by Henry Norris Russell in 1913, and represented a major step towards an understanding of stellar evolution.