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.


Halo Display Observed from Graubunden, Switzerland

December 23, 2022


Sean_4C5DBEC2-262F-4278-8E95-33DAF507563E

Photographer: Sean Lybrand
Summary Author: Sean Lybrand

Shown above is a portion of halo display I had the pleasure to
observe over the Swiss Alps on October 11, 2022. Ice crystals in
clouds or free falling through the atmosphere can create a medley of
beautiful halos; some very obvious and some quite faint.

Conspicuous here are the 22-degree halo, both sundogs or
parhelia, the parhelic circle, the upper tangent arc (tangent
to the 22-halo) and the suncave Parry arc (just above the upper
tangent arc). Not nearly as evident are the rarely seen upper and lower
Lowitz arcs (in the vicinity of the parhelia).


Sent, Graubunden, Switzerland. Coordinates: 46.81016, 10.34032


Related EPODs

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Atmospheric Effects Links

* Atmospheric Optics
* Optic Picture of Day: Gruppo Astrofili Galileo Galilei
* Color and Light in Nature
* The Colors of Twillight and Sunset
* Refraction Index
* Image Gallery: Atmospheric Effects
* What is a Rainbow?

-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

--- up 42 weeks, 4 days, 22 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Saturn's Rings in 2020, 2021 and 2022

November 23, 2022


Astro_by_sona (5)
Photographer: Sona Shahani
Summary Author: Sona Shahani

Shown above is a compilation of images featuring Saturn and its
ring system in 2020, 2021 and 2022. The most recent image was taken
on June 25, 2022. Saturn’s axial tilt is 27 degrees, and from our
perspective we see the rings present themselves differently every
year. Reflection from Saturn’s rings slightly increases how bright
Saturn appears to us. However, even when the “ringed planet” is at
maximum tilt, we’re unable to detect the rings with the naked eye. All
photos observed from New Delhi, India.

Photo details: 8" Skywatcher Flextube Dobsonian telescope; ZWO
ASI178MC; 2.5X; Televue Powermate; EQ Platform; SvBony UV/IR Filter;
Captured in Shaprcap; stacked in ASi3; Wavelets in Registax and fine
tuning in Photoshop.

New Delhi, India Coordinates: 28.6139, 77.2090


Related EPODs

Saturn's Rings in 2020, 2021 and 2022 What is the Color of the
Lunar Seas? Wafer Thin Moon and Pumpkin Sky Paraselene, Antares
and Supermoon Witches Broom in Cygnus Observing Six Major
Annual Meteor Showers
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Night Sky Links

* Space Weather Live
* Space Weather Live Forum
* About the Moon
* American Meteor Society
* Arbeitskreises Meteore e.V.
* Global City Lights
* Heavens Above Home Page
* The International Meteor Organization
* Lunar and Planetary Institute
* MoonConnection
* NASA Eclipse Web Page
* Understanding The Moon Phases

-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

--- up 38 weeks, 2 days, 21 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

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.


Inferior Mirage of Amerigo Vespucci

October 21, 2022

Miraggio Inferiore amerigo L

Photographer: Marcella Giulia Pace

Summary Author: Marcella Giulia Pace

Shown above is a sailing ship, the Amerigo Vespucci, that was
miraged on the horizon of the Ragusa Coast of Sicily, Italy. This
photo was taken from the seafront of Marina di Ragusa (Sicily) at a
height of about 9 m, and therefore the visible horizon was about 10 km
distant. Thus, the Earth's curvature actually conceals most of the
ship. Layers of warm air, beneath layers of cooler air generated this
inferior mirage, in which the visible parts of the ship are flipped
downward. This “overturning” made the ship's bowsprit appear like a
great, open mouth advancing towards the sea.

Note that the "Amerigo Vespucci", an Italian military school ship,
dates from 1931. Click here to see a video of this mirage. Photo
taken on August 28, 2022.

Photo details: Nikon D750 camera; sigma 150-600mm lens; 1200 focal);
1/640 second exposure; f13; ISO 100.


Marina di Ragusa (Sicily), Italy Coordinates: 36.7834, 14.5520


Recent EPODs

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-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

--- up 33 weeks, 6 days, 21 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)