A major astrological event goes down on Monday, December 21: the Great Conjunction of Jupiter and Saturn. Every 20 years, heavenly heavyweights Jupiter and Saturn meet at the same degree of the zodiac, in this case 0º29' Aquarius.

NASA is sending a dual-quadcopter drone to explore the surface of Titan, Saturn’s largest moon. Named Dragonfly, the mission will search for hints of life on a world similar to primordial Earth.

June 28: Get ready to see another world from the eyes of a dragonfly — at least, a robotic one.