Available now! 2026 EarthSky lunar calendar. A unique and beautiful poster-sized calendar showing phases of the moon every night of the year! And it makes a great gift. The world's 3rd known interstellar object - 3I/ATLAS - made its closest pass of the sun back on October 29, 2025.

The challenges of interstellar travel are immense. However, one scientist has proposed an easier (albeit very slow) way to move between stars: let free-floating planets carry us. If she's right, it could change how we search for life elsewhere in the universe.