Astronomy Cast

Wizzard Media

Science & Medicine, Natural Sciences

Chart Positions

Natural Sciences 5
Science & Medicine 14

Astronomy Cast brings you a weekly fact-based journey through the cosmos.


Ep. 196: Luminosity and Magnitude

June 28th, 2010

Episode 228 of 460 episodes

Astronomers measure the brightness of stars as magnitude. But this brightness depends on the distance to the star as well as the total amount of energy it's pumping out into space. And from our vantage point here on Earth, appearances can be deceiving.

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