How to Stargaze in the Cold: A Cozy Guide to Winter Nights

There's a secret most backyard astronomers figure out sooner or later: winter is the best season for stargazing. The nights start early, the air is often crisper and steadier, and some of the brightest constellations of the whole year climb into the sky after dinner. The catch, of course, is the cold. Standing still in a dark yard in November or December is a very different thing from strolling around on a summer evening.

The good news is that staying warm is mostly about planning. With the right layers, a thermos of something hot and a little bit of know-how, you can spend an hour under the stars and come inside smiling instead of shivering. Here's how we like to do it.

Dress Like You're Going to Stand Still

The biggest mistake people make is dressing for a quick walk. Stargazing means standing, sitting or lying down for long stretches, and your body makes far less heat when it isn't moving. A good rule is to dress for temperatures about 15 to 20 degrees colder than the forecast.

Think in layers:

• A base layer that wicks moisture, like thermal underwear or a snug long-sleeve shirt. Skip cotton right against your skin if you can, since it holds onto dampness.
• A warm middle layer, like a fleece or a thick wool sweater. This is where secondhand shopping really shines. Thrift stores are full of chunky wool and fleece pieces that cost a fraction of new and are perfect for getting a little grass or frost on.
• An outer shell that blocks the wind. Even a light breeze steals heat fast on a clear night.

Then cover the edges. A knit hat, a scarf or neck gaiter, thick socks and insulated boots make a huge difference. For your hands, try thin gloves under fingerless mittens or flip-top mittens, so you can still turn pages in a star guide or adjust a pair of binoculars.

Bring the Warmth With You

A few small comforts turn a chilly session into a cozy one:

• A thermos of something hot. Cocoa, cider, tea or coffee all work. Sipping a warm drink between constellations is half the fun.
• Something to sit or lie on. The ground pulls heat out of you quickly. A foam camping pad, a folded moving blanket or a reclining lawn chair with a blanket on top keeps you off the cold earth.
• A big blanket or sleeping bag. Wrapping up in a sleeping bag on a reclining chair is one of the most comfortable ways to watch for meteors.
• Hand warmers. The disposable kind are handy to tuck into pockets or boots.

If you like a little extra cheer, bring your drink out in a space mug. A heat-changing constellation or solar system mug is a fun way to start the night, since the stars on the cup appear as soon as you pour something warm into it.

Protect Your Night Vision

Your eyes need time to adjust to the dark. It takes roughly 20 to 30 minutes for them to fully adapt, and a single glance at a bright phone screen can reset much of that progress.

A few tips:

• Use red light. A red flashlight, or a regular flashlight with red cellophane taped over it, lets you see your path and your star chart without wrecking your dark adaptation.
• Turn your phone's brightness all the way down, or use a night mode with a red filter if your phone has one.
• Turn off porch lights and pick a spot that's shielded from streetlights or neighbors' windows if you can.

Keep Your Gear Happy in the Cold

Cold weather is tough on batteries. Phones, flashlights and cameras can drain much faster than usual, so keep spare batteries or a power bank in an inside pocket where your body heat keeps them warm.

If you bring binoculars or a telescope inside after a cold session, let them warm up slowly while still in their case or bag. That helps keep moisture from condensing on the lenses. And if dew or frost starts forming on your optics outside, don't wipe it with your sleeve; let it clear on its own once the gear is back to room temperature.

What to Look For on Winter Nights

Winter skies are packed with bright, easy-to-find sights, which makes this a great season for beginners.

Orion is the star of the show. Look for three bright stars in a short, straight row, which form Orion's Belt. The reddish star at one shoulder is Betelgeuse, and the blue-white star at the opposite foot is Rigel. Just below the belt, a fuzzy patch marks the Orion Nebula, a giant cloud of gas where new stars are forming. Even a basic pair of binoculars shows it nicely.

The Pleiades, sometimes called the Seven Sisters, is a tight little cluster of blue stars that looks almost like a tiny dipper. Follow the line of Orion's Belt up and to the right and you'll land near the orange star Aldebaran in Taurus, with the Pleiades a bit farther along.

Sirius, the brightest star in the night sky, sits low in the southeast later in the evening. Follow Orion's Belt down and to the left to find it. When it's near the horizon it often twinkles in flashes of color, which is just our atmosphere bending its light.

Gemini shows up as two bright stars side by side, Castor and Pollux, rising in the east as the evening goes on.

If you connect several of these bright stars together, including Sirius, Rigel, Aldebaran, Capella, Pollux and Procyon, you get a huge loose shape known as the Winter Hexagon. Tracing it is a fun challenge for a first night out.

Watch for Winter Meteors

Late fall and early winter bring a couple of meteor showers worth bundling up for. The Leonids peak in mid-November, and the Geminids peak in mid-December. The Geminids are usually one of the strongest showers of the year, so they're a great excuse to set up a reclining chair, wrap up in a sleeping bag and watch the sky for a while. Check a current sky calendar for this year's peak dates and moon phase, since a bright moon can wash out fainter meteors.

You don't need any equipment for meteors at all. Just get comfortable, look at a wide patch of sky away from bright lights and give your eyes time to adjust.

A Good Guide Makes It Easier

If you're new to finding constellations, a printed field guide is still one of the best tools around. It works without a signal, doesn't glow in your eyes and is easy to flip through with a red flashlight. The National Geographic Backyard Guide to the Night Sky is a friendly pick for beginners. Thrift stores and used bookshops are also great places to hunt for older astronomy guides and star atlases; the constellations haven't changed much, even if the book has a few years on it.

Come Inside to Something Cozy

Part of the magic of winter stargazing is coming back in. Warm up with another mug of cocoa, hang your layers to dry and keep the space mood going a little longer. A glowing moon lamp on a side table or a starry building set waiting on the coffee table is a nice way to end the night while your fingers thaw.

Winter nights are long, clear and full of bright stars, so don't let the cold keep you indoors. Bundle up, bring something warm to drink and go say hello to Orion. Live long and prosper, and stay cozy out there.