Woolly Geranium – Geranium erianthum
Posted by Lee Petersen | October 4, 2020
Woolly Geranium – Geranium erianthum

The woolly geranium (or northern geranium, cranesbill) is a tall purple-flowered perennial native to Alaska, parts of Canada, and Asia. Photos and identification info.

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aurora borealis over fairbanks alaska
Posted by Lee Petersen | September 27, 2020
What Causes the Aurora

A basic, yet comprehensive explanation of what causes the aurora. Tying together the solar wind, geomagnetic field, Van Allen belts, atomic energy states, and the electromagnetic spectrum.

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Posted by Lee Petersen | September 26, 2020
Review: Tokina 11-16mm f/2.8 AT-X116 Pro DX II Digital Zoom Lens

My review of the Tokina 11-16mm f/2.8 wide angle lens. A great lens for aurora and night sky photography! Gallery with some sample images.

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Mountain death camas – Anticlea elegans
Posted by Lee Petersen | September 20, 2020
Mountain death camas – Anticlea elegans

Mountain death camas is a lily-like white flowering plant in moist grasslands. The whole plant is very toxic to humans and livestock.

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Mountain harebell – Campanula lasiocarpa
Posted by Lee Petersen | September 11, 2020
Mountain harebell – Campanula lasiocarpa

Mountain harebell is a small, flowering alpine plant typically 5-15 cm (2-6 in) tall. The flower is a solitary violet upright bell about 2.5-4 cm (1-1.5 inches) long.

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Arctic Daisy – Chrysanthemum arcticum
Posted by Lee Petersen | September 8, 2020
Arctic Daisy – Chrysanthemum arcticum

The arctic daisy (Chrysanthemum arcticum) is a 10-45 cm (4-18 in) tall perennial herb with white ray florets and yellow disk florets.

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Posted by Lee Petersen | September 7, 2020
Plotting Simple Functions

The following are a few examples of how to create a simple plot in Matlab/Octave, Python3, and Julia. I made a similar look between all three programs, trying to keep...

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A hiker on the Gulkana Glacier
Posted by Lee Petersen | September 6, 2020
Late summer day hikes around Fairbanks

Late summer day-hiking near Fairbanks in 2020. Photos from the Gulkana Glacier, Nome Creek, Creamer's Field, and Angel Rocks.

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Ice Crystals in R-Channels
Posted by Lee Petersen | September 5, 2020
Ice Crystals in R-Channels

Photos and brief description of ice crystal growth in an R-channel, or Röthlisberger style subglacial channel in winter - Castner Glacier - Alaska Range

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Bitter fleabane – Erigeron acris
Posted by Lee Petersen | September 3, 2020
Bitter fleabane – Erigeron acris

Bitter fleabane or blue fleabane is a flowering herbaceous plant with many small, purple flowers. It goes to seed like a dandelion with many fine white filaments.

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