Early risers across North America and Europe may notice something unusual in the skies this Christmas, a bright, silent light, gliding smoothly overhead in the hours before sunrise on Dec. 24 and Dec. 25.
It won't blink like an airplane and it won't leave a trail behind. Instead, it will appear suddenly, move steadily across the sky and fade away just minutes later. To young, eager eyes already awake and brimming with excitement, it might look like something (or someone) making a quiet journey through the dawn sky.
