This week on Looking Up guest host Caitlyn Voige illuminates a luminary by the name of Henrietta Swan Leavitt. When we look up into the night sky, stars look immeasurably small and distant, unchanging ...
Betelgeuse—a gigantic star in the final stages of its life—has been acting weird lately, exhibiting dramatic drops in brightness. New research attributes enormous star spots to Betelgeuse’s flaky ...
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Why quasars are dimming
Quasars, the luminous beacons at the centers of distant galaxies, have puzzled astronomers for decades with their dramatic brightness variations. Recent observations suggest that these celestial ...
Hubble proved Andromeda is a separate galaxy by identifying a Cepheid variable star within it. Cepheid variables have a period-luminosity relationship: longer period means greater brightness. Knowing ...
Later this decade, the Large Hadron Collider will be upgraded to the High-Luminosity LHC. What does “luminosity” mean in particle physics? Even on the hottest and driest days, rays from the sun are ...
A team has studied the relation between galaxy size and luminosity of some of the earliest galaxies in the universe taken by the James Webb Space Telescope, less than a billion years after the Big ...
High-brightness LEDs, or HB-LEDs, are semiconductor-based devices that feature higher luminosity than traditional LEDs, and they can withstand higher current levels and power dissipation. These LEDs ...
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