Learn about color and how to create a spectroscope using simple materials. What is color? Learn about light and wavelengths and what creates color in this episode of Camp GPB. Then learn how to build ...

Depending on the circumstances you find yourself in, a Geiger counter can be a tremendously useful tool. With just a click or a chirp, it can tell you if any invisible threats lurk. But a Geiger ...

On Aug. 18, 1868, a French astronomer named Pierre Jules César Janssen discovered helium while observing a total solar eclipse in India. During the eclipse, Janssen was using a spectroscope to look at ...

First-time celestial events and superlatives are always fun. So this month, let’s scour the history books to uncover some record-holders you’ll recognize — and some you won’t. Since astrophysicists ...

Stephan's Quintet includes four distant galaxies that are connected through gravity and one galaxy that is much closer to us but just happens to lie in the same direction in the sky. Public domain via ...

Humans have been studying total solar eclipses for millennia to better understand the cosmos. Total eclipses have helped prove Einstein's theory of relativity and led to the discovery of helium. Here ...

If you look at the crescent moon this evening (May 26) you’ll notice two bright stars to its right. They’re Castor and Pollux the mythical Greek twins. I’ve also read they were half-brothers so it ...