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DESI “first light” image of the Whirlpool Galaxy, also known as Messier 51. This image was obtained the first night of observing with the DESI Commissioning Instrument on the Mayall Telescope at the Kitt Peak National Observatory in Tucson, Arizona; an r-band filter was used to capture the red light from the galaxy. (Credit: DESI Collaboration)

Dark Energy Instrument’s Lenses See the Night Sky for the First Time

On April 1, the dome of the Mayall Telescope near Tucson, Arizona, opened to the night sky, and starlight poured through the assembly of...
This is Why our Universe has Three Dimensions

This is Why our Universe has Three Dimensions

You might never consider the reason behind why our universe has three dimensions. Although the question is one of the most profound puzzles in cosmology....