This is a Fire Rainbow, one of the rarest weather phenomenon on Earth. In order for this effect to be achieved the clouds have to be Cirrus and 2kms high, and there must be a sufficient density of ice crystals in the air in order to refract and reflect the sunlight. The crystals need to be fairly large and plate-shaped. The sunlight then needs to strike the crystals at exactly 58 degrees, and voila! One of the most beautiful things I’ve never seen. This gorgeous optical phenomenon is also known as a Circumhorizontal arc or ice-halo. Variations of the phenomenon include the Infralateral arc and the Supralateral arc.
- "Freedom isn't about going to the ballot box once every 5 years & not doing anything in between." - @GarethCliff http://t.co/6e2Am2LjOt 16 hours ago
- bit.ly/1pEfzrU A YouTube user called SuspiciousObserver has a great playlist called Sun Series on solar flares, CMEs, solar wind etc 1 day ago
- photomath.net PhotoMath is an app which reads & solves mathematical expressions by using the camera. It also gives you the steps 2 days ago
- tumblr.com/search/anne+bi… Anne Birgitte Fyhn's Aurora Borealis photos, most taken in Tromsø Norway, are on Tumblr. http://t.co/z02kuUHzaF 3 days ago
- I was able to see this monster sunspot on my way to work this morning thanks to cloud cover & a tinted windshield. spaceweather.com 3 days ago
Keep an eye on:Free Society Institute South Africa. A non-profit society encouraging skepticism and secularism in South Africa.
Astronomy picture of the day archive by NASA. This is one of my all-time favourite sites. I visit it every single day & so should you.
Bad Astronomer Phil Plait blogs at Slate.
Astronomy Education is a compilation of direct links to homepages of different astronomy and space websites.