Utah Skies
"Bringing the Joys of Astronomy to the Public Through Awareness, Advocacy, and Education."

Check out our Spaceweather Section

HMO

TCO

SLC

Solar Phenomena

2003-02-07 -- Sun Dogs

This beautiful picture was captured at sunrise on a cold and still Park City morning.  Called sundogs, this phenomenon is caused by sunlight being refracted through ice crystals.

Taken by Don Brown with an Olympus OM1 and a 28mm lens, this image shows two parhelia on each side of the sun and one just visible at the top of the image.  The ice crystals must be preferentially oriented horizontally and the sun-observer line of sight must be close to horizontal in order to see such a site.

Sundogs are also know as mock suns, and are similar to halos (refraction through randomy oriented crystals) and sun pillars (reflection off of horizontally oriented crystals).

2003-02-06 -- Sun Pillar

A sun pillar as imaged by Anthony ArrigoSun pillars are the result of sunlight reflecting off of ice crystals in the air.  The picture on the right was taken by Anthony Arrigo using a Canon Rebel 2000 with a 28mm lens.

Along with other atmospheric optical phenomenon, pillars can be caused by the Moon and Venus, too! Terrestrial sources can create pillars, as well.

Park City sun pillar, as imaged by Don Brown Anthony kindly called Don Brown on this cold morning, who then captured this image with an Olympus OM1 and 28mm lens.

1999-01-28 -- Sun Pillar and "Diamond Dust"

...a morning sun pillar...This beautiful sun pillar was captured by Don Brown with an Olympus OM-1 at 75mm, 1/1000 sec,  f/16. Notice the sun reflecting off of the foreground ice crystals, also known as "diamond dust".  We called it "Pixie Dust" that morning...

 

Events

> -

Did you ever consider...

"Things get worse under pressure." - Murphy's Law of Thermodynamics

News

NASA Glenn To Host Tweetup Celebrating 50th Anniversary Of First American To Orbit Earth
NASA Receives Second Highest Number Of Astronaut Applications
NASA Spacecraft Reveals New Observations of Interstellar Matter
Legendary Astronaut Shannon Lucid Retires From NASA
NASA to Host Media Telecon on Space Station Status
Call for White Papers to define the Gemini InfraRed-Optical Spectrometer (GIROS)
Gemini North ODB back online.
New version of the Gemini IRAF package released (v1.11)
2012A Programs and Schedule Announced
Updated 2012A OT available
The Helix in New Colours
Planet Population is Plentiful
El Gordo — A “Fat” Distant Galaxy Cluster
ESO Celebrates 50 Years of Reaching New Heights in Astronomy
The Smoky Pink Core of the Omega Nebula
Astronomical Success: Caltech's George Helou Honored by Home Country of Lebanon
Teacher Program Brings NASA Research to High Schools, Middle Schools, Museums
Before They Were Stars: New Image Shows Space Nursery
Herschel and Spitzer See Nearby Galaxies' Stardust
NASA Telescopes Help Find Rare Galaxy at Dawn of Time
Homeless Project Residents Drink Less If Booze Ban Is Lifted
Schism over H5N1 Avian Flu Research Leaks Out
Close Super Bowl Boosts Ad At End
For Healthy Cities, Government and Business Need to Reverse Roles
China Greenhouse Gas Emissions Set to Rise Well Past U.S.