December 21 2025 Planet Alignment Time. The planets will be closest to earth on december 21, but the alignment should be visible through the 26th. This year 2025 will bring an unusual alignment that will mark the beginning of a long list of astronomical events.
Celestial enthusiasts have much to look forward to in 2025, with eclipses, meteor showers, and planetary alignments lighting up (or darkening) the sky. 21, 2025 when mars, jupiter, uranus, neptune, venus and saturn align, according to star walk.