Observing the sun


Solar disc in visible light

Sun spots

Chromosphere through a LIMICON Halpha filter

Chromosphere through a Coronado PST

Sunlights


Sunlights

 

Sun setting over the Channel in front of Dinard (Brittany). This picture was captured with a CANON EOS300D digital camera at the focus of a 300mm refractor (F/4.3).

Sun setting in Brittany

Movie from this picture (640x480 compression DIVX 302K)

Don't mistake about the lattitude of Brittany ! The vertical path of the sun is just the result of picture registration. In fact the sun is moving down to the right.

 


Jet airliner flying in front of a setting sun (click to enlarge).
Picture captured with a 8" MEADE LX10 telescope and a CASIO QV4000 digital camera behind a 40mm eyepiece.

Setting sun and jet airliner 04-23-2003

 


Crepuscular rays observed as the sun was setting down over Mount Aigoual (CÚvennes mountains).
Captured with CANON EOS300D and 18mm lens.

Crepuscular rays

 


Sun setting behind trees. Spectral sun light spreading gives a green color to the top of the solar limb. This phenomenon is commonly called green ray. With naked eye, it is perceived just a few seconds before the sun is fully set under the horizon.
Picture taken with a MEADE ETX-90EC telescope and an EPSON PC3000Z digital camera behind a 40mm eyepiece.

Green ray

 


Sun setting in clear sky on Gironde estuary in France.
Picture taken from the Blaye citadel with an EPSON PC3000Z digital camera.

Sun-down on Gironde

Movie from this picture (500x382 .GIF format 382K)

 


Sun setting in cloudy sky on Gironde estuary in France.
Picture taken from the Blaye citadel with an EPSON PC3000Z digital camera.

Sun-down on Gironde

 


Solar halo captured at the bottom of a building.
This circular halo whose radius is 22░, is the result of the decomposition of sunlight by ice cristals in cirrus clouds.
Picture captured with an EPSON PC3000Z digital camera.

Solar halo

 


Circumzenithal arc
A circumzenithal arc is produced by refraction of sun light by ice cristals in high clouds. Appearing very closed to zenith, it’s often remains ignored. It’s always surprising to see this inversed rainbow rolled up around zenith. A circumzenithal arc is frequently associated with a 22░ halo.
Picture captured with an EPSON PC3000Z digital camera.

Circumzenithal arc

 


This iridescence is called sundog. Sundogs appear symetrically 22░ apart from the sun, at the same level as the sun. This one was captured on the right side of the sun.
Picture captured with a CASIO QV4000 digital camera.

Sun dog

Evolution of a parhelion (900x600 DIVX compression 1954k)

This accelerated movie represents a real duration of about 40 minutes (5 seconds between consecutives exposures with CANON EOS300D and Pocket Shutter sequencer).

 


Couple of parhelia captured in late afternoon with an EPSON PC3000Z digital camera. Click to enlarge.

left and right parhelia

 


Sometime clouds are covered with magnificent nacreous colours. Such clouds are called iridescent clouds. This phenomenon occurs when the size of droplets composing the cloud is uniform. Iridescence results from interferences between sun rays diffracted by droplets.
Picture captured with a CANON EOS 300D digital camera.

Nuage irisÚ

 


Solar pillar above canadian forest in Quebec. This phenomenon is the result of the sun light reflecting on atmospheric ice particles.
Picture taken with an EPSON PC3000Z digital camera.

Sun pillar in Quebec

 



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