On April 22, the half moon will shine just 3 degrees away from Jupiter and the planet will sit beneath the stars Castor and Pollux. The pair will be visible in the western sky after sunset. The moon will be situated above and to the right of Jupiter, approximately three degrees away. Jupiter, at about -2.1, outshines everything in the night sky except the moon. This aligns with the Gemini twins, positioned about 9 degrees above Jupiter and about 6.5 degrees above the moon, which author H.A. Rey noted in his classic constellation guide, The Stars — A New Way to See Them. Jupiter is a prime attraction for telescopes, particularly as it appears only half as big as it did at its opposition in early January.