Astronomy Cast Ep. 412: The Color of the Universe

What color is the Universe? Turns out this isn’t a simple question, and one that scientists have really been unable to answer, until now! Visit the Astronomy Cast Page to subscribe to the audio podcast! We record Astronomy Cast as a live Google+ Hangout on Air every Monday at 12:00 pm Pacific / 3:00 pm […]

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Astronomy Cast Ep. 411: The Science of Sunset Colors

We all enjoy beautiful, multicolored sunsets. But what causes the brilliant oranges, pinks and purples that we see, and why does it change from day to day and season to season? Visit the Astronomy Cast Page to subscribe to the audio podcast! We record Astronomy Cast as a live Google+ Hangout on Air every Monday […]

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Astronomy Cast Ep. 405: Method Not Found

Last week we talked about knowledge, what we do and don’t know. This week we talk about questions which are impossible to ask, where the answers don’t actually exist. Visit the Astronomy Cast Page to subscribe to the audio podcast! We record Astronomy Cast as a live Google+ Hangout on Air every Monday at 12:00 […]

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The Journey of Light, From the Stars to Your Eyes

This week, millions of people will turn their eyes to the skies in anticipation of the 2015 Perseid meteor shower. But what happens on less eventful nights, when we find ourselves gazing upward simply to admire the deep, dark, star-spangled sky? Far away from the glow of civilization, we humans can survey thousands of tiny pinpricks of light. But how? Where does that […]

Astronomy Cast Ep. 368: Searching for the Aether Wind: the Michelson–Morley Experiment

Waves move through a medium, like water or air. So it seemed logical to search for a medium that light waves move through. The Michelson-Morley Experiment attempted to search for this medium, known as the “luminiferous aether”. The experiment gave a negative result, and helped set the stage for the theory of General Relativity. (…)Read […]