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.

New Sapphire Wire, Could Transform, Aviation and Fusion Power. 'The Independent' reports that a new "sapphire fiber" could transform aircraft technology and potentially lead to breakthroughs in fusion power. 'The Independent' reports that a new "sapphire fiber" could transform aircraft technology and potentially lead to breakthroughs in fusion power.