Welcome, Guest. Please Login or Register

Author Topic: If you're in GP look at the sun quick!  (Read 525 times)

0 Members and 1 Guest are viewing this topic.

Offline Lourens ツ

If you're in GP look at the sun quick!
« on: November 01, 2010, 10:08:50 am »
 :o

If you don't have any cloud cover that is.  ;D

See other thread
« Last Edit: November 01, 2010, 11:09:26 am by Lourens dL »
Lourens de Lange
 

Offline ThinkMike

  • 2-wheel Addiction
  • Senior Member
  • ***
  • Bike: BMW R1200GS
    Location: Gauteng
  • Posts: 657
  • Not now honey, I'm Riding
    • Southern Africa Aventure Trips
Re: If you're in GP look at the sun quick!
« Reply #1 on: November 01, 2010, 10:20:07 am »
Quite Cool


Ring Around the Sun
September 24th, 2008 by Fraser Cain

http://www.universetoday.com/18568/ring-around-the-sun/

Solar halo - a ring around the Sun. Image credit: Matt Saal

Have you ever looked up and noticed that there’s a big ring around the Sun? These rings are caused by ice crystals within thin cirrus clouds, and there several different kinds of sun rings you can see depending on the weather conditions.

One of the most common ones is called a 22° halo. They get this name because the ring is located 22 degrees away from the Sun itself. Both the Sun and the Moon block a 1/2 degree region of the sky at a time, so the ring around the Sun is about 44 times larger than the Sun itself.

Why do you get a ring at exactly 22°? The ring is formed because of the ice crystals suspended in the cirrus clouds. If you could look at the crystals under the microscope, you would see that they’re hexagonal in shape, and act as prisms for the Sun’s light. As light passes through the two sides of the prism, it’s deviated by exactly 22°. Since the ice crystals are jumbled up randomly in the sky, most of the light is deflected away. But from every position you’re always able to see the deflected light from some of the crystals in the sky. And this is why you see the bright ring around the Sun.

When you’re looking for halos, or rings around the Sun, make sure you always shield both eyes from the Sun. Even looking at the Sun for an instant can cause permanent eye damage.

Here’s an article from Universe Today that includes instructions for looking for Sun halos.

Here’s a great article from Atmosphere Optics that helps to explain the process.

We have recorded an episode of Astronomy Cast just about the Sun called The Sun, Spots and All.

Sorry Babe I am still riding.
 

Offline RobC

  • Bachelor Dog
  • *****
  • Bike: Kawasaki KLR 650
    Location: Free State
  • Posts: 13,387
  • Thanked: 151 times
  • Bloemfontein
Re: If you're in GP look at the sun quick!
« Reply #2 on: November 01, 2010, 10:21:35 am »
Ice crystals... in NOVEMBER! ::)
 

Offline Ama ride ride

  • Gravel unlimited
  • Forum Whore
  • ****
  • Bike: Zero (all models)
    Location: New Zealand
  • Posts: 5,735
  • Thanked: 66 times
  • Ride to ride again
Re: If you're in GP look at the sun quick!
« Reply #3 on: November 01, 2010, 10:30:28 am »
flippin oulik ;D
Gewoontlik n@@i ek reguit aan op fyndraai.

 

Offline RobC

  • Bachelor Dog
  • *****
  • Bike: Kawasaki KLR 650
    Location: Free State
  • Posts: 13,387
  • Thanked: 151 times
  • Bloemfontein
Re: If you're in GP look at the sun quick!
« Reply #4 on: November 01, 2010, 10:33:17 am »
Similar thread at http://www.wilddog.za.net/forum/index.php?topic=58911.0
But let's keep this one here for anyone else that takes any cool pic's of the event.
I see it has been mentioned... :mwink:
« Last Edit: November 01, 2010, 10:43:55 am by RobC »