blackbody radiation
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The Cosmic Microwave Background Radiation
What if I told you that this was an actual image of the night sky? Well…alright, I admit it’s more like a map. Specifically, a map of the cosmic microwave background radiation, often known simply as the CMB. This is…
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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…
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Stars and Radiation
Stars are hot. Really hot. Hot enough to have energy to spare for their planets. If our star wasn’t hot, we couldn’t live on Earth. And our star isn’t even particularly hot for a star. It’s a middle-aged star of…
