DECEMBER 2025 (Northern Hemisphere)
| 4 | Moon, Uranus and the Pleiades within 5.0° circle at 1h UT (evening sky). Mag. 5.6. Near Full Moon. |
| 4 | Moon near the Pleiades at 4h UT (evening sky). |
| 4 | Moon at perigee (closest to Earth) at 11:11 UT (distance 356,963km; angular size 33.5′). |
| 4 | Full Moon at 23:14 UT. Supermoon. • Supermoon (Wikipedia) |
| 6 | Moon near M35 Cluster at 7h UT (morning sky). |
| 7 | Moon near Castor at 11h UT (morning sky). |
| 7 | Moon near Pollux at 17h UT (morning sky). |
| 7 | Moon near Jupiter at 18h UT (morning sky). Mag. −2.6. |
| 7 | Mercury at westernmost elongation at 21h UT (21° from Sun, morning sky). Mag. −0.4. |
| 8 | Moon near Beehive Cluster (M44) at 17h UT (morning sky). |
| 10 | Moon near Regulus at 9h UT (morning sky). |
| 11 | Last Quarter Moon at 20:52 UT. |
| 14 | Geminid Meteor Shower peaks in a broad maximum centred at 8h UT over 10−12 hours. Active December 4−17. Produces bright, medium-speed meteors (100+ meteors/hour) at its peak. The best and most reliable of the major annual showers. • Geminids (Wikipedia) • Geminids (American Meteor Society) • 2025 Meteor Shower Calendar (PDF) (International Meteor Organization) |
| 14 | Moon near Spica at 17h UT (morning sky). |
| 17 | Moon at apogee (farthest from Earth) at 6h UT (distance 406,322km; angular size 29.4′). |
| 18 | Moon near Mercury at 11h UT (18° from Sun, morning sky). Mag. −0.5. |
| 18 | Moon near Antares at 14h UT (17° from Sun, morning sky). |
| 19 | Mercury 5.5° NNE of Antares at 21h UT (18° from Sun, morning sky). Mags. −0.5 and 1.0. |
| 20 | New Moon at 1:43 UT. Start of lunation 1274. |
| 21 | December solstice at 15:01 UT. The time when the Sun reaches the point farthest south of the celestial equator marking the start of winter in the Northern Hemisphere and summer in the Southern Hemisphere. • December Solstice (Wikipedia) |
| 27 | Moon near Saturn at 1h UT (evening sky). Mag. 1.2. |
| 27 | First Quarter Moon at 19:10 UT. |
| 31 | Moon, Uranus and the Pleiades within 5.2° circle at 11h UT (evening sky). Mag. 5.6. |
- US Eastern Standard Time = UT − 5 hours.
- US Pacific Standard Time = UT − 8 hours.
- Australian Eastern Daylight Time = UT + 11 hours
- Singapore Standard Time = UT + 8 hours.
More sky events and links at http://Skymaps.com/skycalendar/
Visit my YouTube Page for captures of many of the Night Sky events for each month.