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.


Archive - Star Trails Above Pemaquid Point Lighthouse, Bristol, Maine

August 07, 2021

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Each weekend we present a notable item from our archives. This EPOD
featuring a lighthouse for this weekend's Lighthouse Day was
originally published December 1, 2012.

Photographer: John Stetson
Summary Author: John Stetson
The photo above showing the Pemaquid Point Lighthouse and trails of
overhead stars was captured just before dawn in Bristol, Maine on
October 23, 2012. The camera was facing east. Venus is the
brightest trail, rising from the Gulf of Maine. At the latitude of
the Pemaquid Point Lighthouse, approximately 44 degrees north, all
stars having a declination greater than 46 degrees (stars at the
top left of the photo) would be circumpolar -- they never rise and
set but are above the horizon throughout the year. Said in another way,
at a latitude of 44 degrees any star will be circumpolar if it's less
than 44 degrees from the north celestial pole. At the North
Pole, all of the stars in the sky are circumpolar. Note that the
Tiangong-1 satellite appears as an arc perpendicular to the star
trails above the lighthouse.
* Pemaquid Point Lighthouse, Bristol, Maine Coordinates: 43.8369528,
-69.5060472

Related EPODs

Archive - Star Trails Above Pemaquid Point Lighthouse, Bristol,
Maine Archive - Full Moon Over Mount Rainier The Power of One
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Mineral Moon and ISS Transit
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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 13 weeks, 1 day, 12 hours, 15 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)

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.


Trace Fossils in Hanover Formation

October 07, 2021


BurrowsHanoverShale

Photographer: James R. Ebert
Summary Author: James R. Ebert

Unlike body fossils (shells, bones, chitinous material, plant
tissue, etc.), which are the actual remains of once living organisms,
trace fossils or ichnofossils are marks (burrows, tracks, trails,
etc.) made by the activity or behavior of an organism. This photo shows
an abundance of burrows of the ichnogenus Planolites in a bed of
dark gray to black shale in the Hanover Formation, exposed in
Sheridan Bay on Lake Erie, east of the city of Dunkirk, New York. The
contrast between the sediment fill of the burrows and the surrounding
shale is enhanced because the bed containing the burrows is wet owing
to its position at lake level. Note that the trace-makers responsible
for Planolites were probably worm-like creatures that tunneled
through the mud, ingesting the sediment, digesting the organic matter
that it contained, and excreting the undigested sediment as fill in the
tunnels behind the organisms. Photo taken on June 28, 2021
* Dunkirk, New York Coordinates: 42.5186, -79.2686

Related EPODs

Trace Fossils in Hanover Formation Moonlight Silhouette of
Erupting Volcán de Fuego and Acatenango Yellowstone’s Colorful
Canary Spring Armored Mud Balls and Mud Cracks in Southern Utah
Queen's Shoe Formation on Tenerife Analog Environment Testing
for Mars Exploration
More...

Geology Links

* Earthquakes
* Geologic Time
* Geomagnetism
* General Dictionary of Geology
* Mineral and Locality Database
* Mohs Scale of Mineral Hardness
* This Dynamic Earth
* USGS
* USGS Ask a Geologist
* USGS/NPS Geologic Glossary
* USGS Volcano Hazards Program

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

https://epod.usra.edu

--- up 4 weeks, 6 days, 21 hours, 55 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)

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.


Archive - Frost Crystal Congregation

November 06, 2021

6a0105371bb32c970b01310f5be229970c

Every weekend we present a notable item from our archives.

This EPOD was originally published March 7, 2010.

Photographer: Jean Francois Coliac
Summary Author: Jean Francois Coliac; Jim Foster

The photo above shows an assemblage of lacy frost crystals attached
to a small plant in the French Alps. These large plate crystals
formed in very cold but still relatively humid air. They grew
incrementally as water vapor condensed at the most exposed points
over the crystals’ surfaces (upon edges and imperfections). Note that
frost crystals tend to form perpendicular to vertical features such as
plant stalks or leaf stems. Photo taken in early February 2010.

Related EPODs

Archive - Frost Crystal Congregation Archive - Gurgler Glacier
April Snow in Dolly Sods, West Virginia Ice Falls in Valganna,
Italy Ice Cover and Ice-Out on Sebago Lake During the Winter of
2021 Archive - LaCrosse Ice Falls
More...

Cryosphere Links

* Guide to Frost
* What is the Cryosphere?
* Bentley Snow Crystals
* Glaciers of the World
* Ice, Snow, and Glaciers: The Water Cycle
* The National Snow and Ice Data Center Google Earth Images
* Snow and Ice Crystals

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

https://epod.usra.edu

--- up 9 weeks, 2 days, 22 hours, 55 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)