Visible light travels in electromagnetic waves, which we see as the colors of the rainbow. Different colors have different wavelengths of light. Violet and blue have the shortest wavelengths, whereas ...

The sky tells us a lot about what’s going to happen in weather. Last night’s sunset had a few strong hints as the chaotic sky developed. Sorry, I’m going to ...

Mercury is making its way through Gemini, passing close to the star Mebsuta (Epsilon [ε] Geminorum) this evening. Visible for more than an hour after sunset, the magnitude –0.8 planet shines brightly ...