The Sky in 2021

What if you would possibly perhaps well presumably see all of the sky — — for a total 365 days? That, very merely about, is what’s pictured here. Every 15 minutes all by technique of 2021, an all-sky digital camera took a image of the sky over the Netherlands. Central columns from these photos were then aligned and blended to get the featured keogram, with January on the tip, December on the backside, and the heart of the night working vertically factual left of heart. What’s going to we see? Most obviously, the daytime sky is mainly blue, while the heart of the night sky is mainly shadowy. The twelve light bands crossing the night sky are precipitated by the glow of the Moon. The thinnest fragment of the shadowy hourglass shape occurs all by technique of the summer season solstice when days are the longest, while the thickest fragment occurs on the winter solstice. The day long previous by turned into once an equinox — when night and day were equal — and the northern-spring equinox from one 365 days ago can in point of fact be positioned within the keogram — about three-quarters of the diagram up. Practice APOD on Instagram in: English, Indonesian, Persian, Portuguese or Taiwanese