
Look east at sunset on Jan. 30 to spot the near-full moon shining close to the gas giant Jupiter among the stars of the constellation Gemini.
Jupiter will appear as a steady "evening star" less than 5 degrees — roughly the width of your three middle fingers held to arm's length — to the lower right of the lunar disk in the eastern sky, with the bright stars Castor and Pollux twinkling close to its left.