For most astronomers, half of the observing year is spent in cold weather. Family and friends may think you're crazy, and sometimes you might agree. The problem is, some of the best deep sky objects are visible only during winter. Take for example, M42, the Orion Nebula. Orion rises high into the sky during the coldest parts of the winter. In Ohio, where I observe, the coldest nights are usually the clearest too, with excellent transparency and seeing that is marginally better than our usually bad seeing. So in order to take advantage of these great winter deep sky objects and my better atmospheric conditions, I have to venture out into the snow and the cold. I've learned a few things about keeping warm at the telescope in my time under the cold Ohio sky, and I'll share them with you here. At top right, you can see a picture I took of the secondary on my Z10 dob. The whole scope was covered in frost, but my mirrors were still clear, so I kept on viewing! You can keep on viewing too, if you follow these tips to stay warm!
Using these tips, you can make your cold weather observing sessions more comfortable and safer. Frostbite is the enemy, but as long as you keep your fingers and toes warm, you won't have to confront it.