Tag Archives: redshift

Our Sun: Helioseismology

We can’t see below the surface of the sun. That makes sense, really. We can’t see below the surface of the Earth, either—we have to get creative if we want to find out what goes on below the crust. In … Continue reading

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Our Sun: The Photosphere

Recognize this? You might, if you’ve ever seen the sun through a telescope before. What you’re seeing is the photosphere, the layer of the sun whose light reaches Earth. This is the only layer you’ll ever see, without the aid … Continue reading

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The Doppler Effect

Have you ever heard the ice cream truck? When I was little, I remember hearing the ice cream truck all the time. Just the sound of the opening notes of “Pop Goes the Weasel” were enough to propel me to … Continue reading

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