Whys Guys: Stargazing

CHAMPAIGN--

We're turning off the lights for this weeks Whys Guys Wednesday with Jeff Filippini with The U of I Physics Department. 

+ Orion has a bright red star (Betelgeuse) and a bright blue star (Rigel), whose colors you can see on a dark night.

+ Hot objects glow (“black body radiation”).  Red stars are much cooler than our Sun and often very faint, but some (like Betelgeuse) are still bright because they are immensely large.  Blue-white stars like Rigel are the hottest stars in our universe.

+ Orion’s “sword” is a beautiful nebula of gas and dust where new stars are being born.


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