Een maanboog in combinatie met bliksemThere's a full Moon this weekend. That means it's time to be alert for moonbows. Ian Glendinning spotted this one arcing over a lightning bolt in Northumberland UK:
photo Ian Glendinning
"The moonbow framed the lightning nicely--a rare and beautiful coincidence," says Glendinning.
Everyone knows what lightning is. But a moonbow? It's the same as a rainbow with the Moon playing the role of Sun. Raindrops falling in the Northumberland night caught the rays of the waxing full Moon and spread them into a fan of prismatic color.
Glendinning's exposure revealed something even more rare: a secondary moonbow. It's the faint 'bow arciing above the brighter primary. Primary rainbows are caused by single reflections inside raindrops; secondary bows are caused bydouble reflections. Watch for them both this weekend.
Bron: http://www.spaceweather.com/ | Gewijzigd: 30 januari, 13:08 uur, door Joyce.s