StarDate

Moon and Gemini

The first-quarter Moon is gliding across the constellation Gemini tonight. Gemini’s twin stars and the planet Mars form a bright arc above and to the upper left of the Moon at nightfall. Mars is the brightest member of the arc. It’s roughly twice as bright as the star Pollux, which is twice as bright as Castor. Pollux is just 34 light-years away. And it hosts a … Play episode