December on Long Island usually brings twinkling lights, early sunsets, and the first hint of winter. This year, the night sky is joining the celebration with a packed calendar of celestial events, everything from a dazzling supermoon to two meteor showers and even a visiting comet. If you’ve been waiting for the perfect excuse to bundle up, step outside, and look up, this is your month.
The Super Cold Moon (December 4)
The final supermoon of 2025 rises early in the month, appearing larger and brighter than normal as it reaches its closest point to Earth. Known as the “Super Cold Moon,” this one is especially striking thanks to its crisp winter backdrop. If the clouds cooperate, it’ll dominate the evening sky.
The Geminids Take Center Stage (Peak: December 13–14)
Often crowned the best meteor shower of the year, the Geminids will be the true showstopper of December.
- What makes them special? Their meteors are slow, bright, and often streak across the sky in surprising colors. Under ideal conditions, you might see 120 to 150 meteors per hour.
- Best viewing: Before midnight and into the early morning of December 14-15.
- Moonlight impact: Minimal this year, with the moon only 13% full, perfect for meteor hunting.
A Holiday Visitor: Comet 3I/ATLAS (Closest to Earth: December 19)
If you own a small telescope, or know someone who does, mark December 19.
Comet 3I/ATLAS makes its closest approach, potentially becoming visible in the early-morning hours. Even if it remains faint, it’s a rare chance to catch a visiting comet during the holiday season.
New Moon = Dark Skies (December 20)
Right in time for prime meteor-watching and deep-sky viewing, the New Moon brings the darkest skies of the month, offering the best backdrop for spotting fainter stars, nebulae, and perhaps even that elusive comet tail.
The Winter Solstice Arrives (December 21)
At 9:03 a.m. UTC, winter officially begins in the Northern Hemisphere. It’s the shortest day and longest night of the year, ideal for anyone who prefers stars over sunshine.
The Ursids Close Out the Year (Peak: December 22–23)
The Ursid meteor shower is quieter than the Geminids but brings a peaceful kind of beauty.
What to expect:
Around 10 meteors per hour, best seen late on December 22 into the early hours of December 23.
Why this year is special:
The moon will be just 3% full, making for excellent dark-sky conditions at the peak of the holiday season.
Skywatching Tips for December
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Head somewhere dark, beaches and parks are your best bet on Long Island.
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Dress warmer than you think you need.
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Give your eyes 20 minutes to adjust.
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Look up often; meteors can appear anywhere in the sky.
December is shaping up to be one of the most exciting stargazing months of the year. From supermoons to meteor showers, this holiday season’s best light show won’t be on your neighbor’s roof, it’ll be overhead.
