Category Archives: Spectroscopy

The Balmer Thermometer

How hot would you say this star is? Take a wild guess. Well…sorry, but I’m going to stop you for a moment just to make sure we’re all using Kelvins. The Kelvin scale is like the Celsius scale, except water … Continue reading

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The Atomic Spectrum

Astronomers know that if white light passes through a prism and is bent, it’s separated out into its component colors—the colors of the rainbow. Astronomers also know that when light interacts with atoms, the building blocks of the universe, the … Continue reading

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Atoms and Radiation

Everything we know about space comes from radiation. Now wait just a moment here. That statement explains how astronomy is such a successful field of science—it’s based entirely on the information we can glean from radiation, after all. But how … Continue reading

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Info in a Rainbow

What do you see in this image? If you’re from a larger city and haven’t had the opportunity to venture into a place like the desert, you might not know what you’re looking at. That’s the Milky Way, our name … Continue reading

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