Earth's orbit defines the ecliptic, a line on the celestial sphere inclined 23.5° to the celestial equator, reflecting Earth's axial tilt. The Moon's orbit is inclined 5.1° to the ecliptic. The Moon's ...

In this column, we'll focus on the ecliptic, the invisible "racetrack" that hosts the sun, moon and planets. Knowing how it works and where to find it can make you a master planet spotter — you'll ...

On Sunday night we have a great conjunction, or what I like to call a celestial hugging, between the nearly full moon and the planet Jupiter in southern sky. The moon and the largest planet in our ...