The Dark Energy Spectroscopic Instrument is mounted on the U.S. National Science Foundation’s Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory—a program of NSF NOIRLab—in Arizona. Credit: KPNO/NOIRLab/NSF/AURA/B. Tafreshi DESI observations suggest black holes may generate dark energy by consuming stellar matter. The idea resolves puzzles about neutrino mass and cosmic expansion. These are remarkable times for probing …
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