The New Yorker3d
Inside the Fight Against a Los Angeles Inferno
The destruction in parts of Altadena, a few miles to the west of Sierra Madre, and Pacific Palisades, which had burned in a ...
One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...