It’s a fact, Northern Hemisphere stars appear brighter in winter than summer. Why? Our infinitesimally small solar system resides within the Milky Way galaxy, roughly 100,000 light years across with its centre 25-28 thousand light years away from plucky planet Earth. During December, January and February Northern Hemisphere night skies face away from the centre toward outskirts less muddied by cosmic dust. There are fewer stars between us and extragalactic space at this time of year. We’re gazing toward the Orion Arm, a minor spiraling tendril of the Milky Way housing our solar system. At this time of year large stars within the Orion Arm appear closer and brighter courtesy less galactic dust.
Bright winter stars have nothing to do with cold nights, everything to do with orbital alignment in relation to the heart of our galaxy. Don’t be shy, when night skies clear look up and wish upon a bright winter star.