The blue field entoptic phenomenon is an entoptic phenomenon characterized by the appearance of tiny bright dots nicknamed blue sky sprites moving quickly along squiggly lines in the visual field especially when looking into bright blue light such as the sky.
Bright blue light in the sky.
That s why the sky appears blue.
But as a result the last coloured light that can be seen as the sun falls below the horizon is green.
At that time the blue tinted planet will be 4 light hours or 28 9 astronomical units from earth it will shine at a slightly brighter magnitude 7 8 and will be visible all night long in good.
What was that weird blue glow in the sky.
If you ve looked up at the night sky recently you might have been surprised to see a train of bright lights moving.
Normally this effect is very slight.
At that time the planet in question is as close as it gets just 0 4 au so bigger and because it s 100 illuminated from our point of view it s as bright as it can be in our night sky.