EPOD - a service of USRA
The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.
Clouds In a Fiery Sunset
February 18, 2022
DSC_0090m ep
Photographer: Teresa Molinaro
Summary Authors: Teresa Molinaro; Cadan Cummings
Sunrise and sunset are beautiful times of the day to photograph the
gradually changing colors and clouds of our sky. This is embodied
by the photo above from the province of Palermo, Sicily on the evening
of July 4, 2021, when the clouds appeared to be set ablaze in a fiery
red hue. At around 9pm local time, the sky was suddenly tinged with
color that quickly changed from orange to red. The reason the sky at
sunrise and sunset is so vibrantly colored is due to light
scattering. As light passes through the atmosphere, its direction
changes when it interacts with gases and small molecules on the way to
our eyes. Longer wavelengths of light (red and orange) are not as
affected by scatter as shorter wavelength (blue and violet) light. When
the Sun angle is low on the horizon, the sunlight must pass through
comparably more atmosphere, which causes increased scattering of blue
and violet spectra. At sunset and sunrise, this unequal scattering is
why we see mainly red, orange, and yellow light on the horizon.
Photo details: Nikon D3400, 70 mm lens, 1/5 second exposure, f/4.5,
ISO-800,
* Bagheria, Sicily, Italy Coordinates: 38.083, 13.500
Related EPODs
Clouds In a Fiery Sunset Analemma Observed in Taipei, Taiwan
Dusty Sunset Over Sicily Omega Sunrise Over Catania, Italy
Zodiacal Light Mosaic from North and South Hemispheres Earth’s
Rotation and Revolution
More...
Sun Links
* NASA Solar Dynamics Observatory
* NASA Solar Eclipse Page
* NOAA Solar Calculator
* The Sun-Earth Connection: Heliophysics
* The Sunspot Cycle
* Solar System Exploration: The Sun
* The Sun Now
* This Week’s Sky
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Earth Science Picture of the Day is a service of the Universities
Space Research Association.
https://epod.usra.edu
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