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Just my luck! Not many snowstorms create colourful snowflakes, and when they do they are usually smaller hexagonal gems. I was thrilled to encounter this vibrant flower in a slightly large crystal!
The colour here is well understood, but still magical. It’s not colour in the same sense as you would paint with (the paint would absorb certain wavelengths of light and reflect others, you see the reflected light), but rather generated through optical interference. This is the same physics that generates colours in soap bubbles, but in a snowflake is often much more structured.
One way or another, a bubble forms in the ice. The thickness of this bubble dictates the thickness of the ice on either side of it, and shifts in this thickness will change the resulting colours. Light bounces off of reflective surfaces, but a snowflake is ice, not a mirror; some light still enters the snowflake and reflects back off of the additional boundaries between ice and air. When light passes through a denser material (ice), it slows down, and when it reflects back out, it speeds up again. This is critical. If the distance traveled through the ice is small enough, the two rays of light will rejoin, but half of it will be “out of sync”. This causes some wavelengths to cancel out while others are added together, generating specific colours from otherwise white light. Very similar principals apply to sound waves and interference.
Once the bubble is completely enclosed, things can still change. Water molecules can break away from their crystal structure (sublimation) and re-attach elsewhere. This might slightly change the thickness of the ice in certain areas but in a gradual fashion. I suspect this is the reason for the gradient from yellow to magenta at the tips of the internal “petals”.
The central bubble here is fascinating for other reasons as well – just look at the outer edge of it. Notice these little “nubs” in each corner? Imagine the snowflake being just that big. Those little nibs would be the last elements to stay open to the outside air before shifts in temperature and humidity allow the outer edge of the snowflake to become whole again. What’s interesting here is that a snowflake typically grows fastest where it has the greatest access to water vapour – the corners. Why then did the corners take the longest to close up? Moreover, why did the middle of each prism facet also have a nub, which continued to progress a line-like bubble that eventually evolved into a sectored-plate design?
It’s a beautiful physics puzzle and fun to spend some time imagining how and why it came to be.
Shot on a Lumix S1R with a Canon MP-E 65mm macro lens. I’ve used a lot of ring flashes over the years, but my favourite is also one of the most affordable – the Yongnuo YN-14EX II: www.bhphotovideo.com/c/product/1462725-REG/yongnuo_yn_14e... . It’s better in many ways than Canon’s own MR-14EX II, and it’s what I’ve been using to shoot the snowflakes in this year’s series. For more tips on snowflake and general macro photography, you can also check out my upcoming instructional book, Macro Photography: The Universe at Our Feet - skycrystals.ca/product/pre-order-macro-photography-the-un...
For those curious about how the book is progressing? Coming along nicely! Most of the book is just undergoing revisions and grammar checks but there is still more work to be done. I appreciate your patience. :)
Lynds’ Dark Nebula 673 (or LDN 673) is a very dense and highly fractured dark cloud complex in the Aquila Rift. It is located some 400 – 500 light-years from Earth. The Aquila Rift forms a huge mass of dark molecular clouds and consists of numerous small and large nebulae. Situated against the Milky Way’s faint starlight, LDN 673 contains raw material to form a huge number of new stars.
Image captured over 2 nights; 2021-10-09 & 2021-10-12.
2 hours and 48 min total integration
L subs 8 * 360sec = 48 min
R subs 6 * 360sec = 36 min
G subs 7 * 360sec = 42 min
B subs 7 * 360sec = 42 min
Imaging Equipment:
SharpStar 140PH Triplet 910mm focal length
Mesu 200 MKII,
ZWOASI2600MM Pro camera
Vance County - Structure fire at a vacant house at Allison Cooper Road & Bill Bragg Morton Road, Henderson, NC. Cokesbury VFD, Vance County FD, Drewry VFD, Soul City VFD, Ridgeway VFD, Vance County EMS, and Vance County Sheriff's Office responded.
Inspired by Stephen Shore's gorgeous photo; U.S.10 Post Falls, Idaho and it's lyrical beauty and acceptance of the world around us I went this morning searching for just such a scene.
I looked for a location with minimal expression and inherent beauty, yet without drama. Found it 16 miles away.
Some photos are created in a snap or two. this one took me 10 minutes to compose and click.
Full of elements, yet those puddles are the most important ones.
They give your eyes a runway to take off and escape this place.
Noctilux 50mm f0.95, Sony A9, Tech Art Pro LM-EA7. Probably the only combination to get a picture like that. You have to set f stop to 25 to shoot with this combination but the actual f stop on Nocti was of course 0.95. Rather difficult to shoot with this set up, but the dreamy, creamy pictures that come out make it all worth it.
The Redding House is a large double-pen log structure with an open breezeway between the pens. There are stone chimneys on either end of the house. The structure is in excellent condition and has been fully restored by the owner. This was a working farm operated by the Redding family during the war. In addition to the house, there would have been stables, cribs, and other outbuildings. While there is no record of camps, there could have been short-term Confederate camps in the area.
This site is an example of what the women of the Confederacy did during the war. With most of the men away in the army, the females of the County were responsible for holding things together. They managed the farms, and, with the assistance of their children and enslaved Africans (if they owned any), they not only produced food for themselves, but also grew a surplus for sale to the army. Some women worked under government contract during the war making uniforms. The state quartermaster office employed male tailors to cut uniforms from patterns. The cut uniforms, thread, buttons, and other accessories were then sent to women for sewing. The women supported the Confederate cause in numerous other ways.
Each community had a Soldiers Relief Society that was made up of local women and girls. They met to make quilts and knit socks and mittens for the soldiers; they also made uniforms and rolled bandages. These patriotic women welcomed the opportunity to thank men for their military service through gifts and goods provided by local Soldiers Relief Societies. Women made or collected socks, shirts, pants, and blankets for soldiers. Some groups sent goods to local military units, while others forwarded packages to the front with instructions to distribute them as needed. In addition, they frequently sent packages of food for the military camps. Relief societies also sent reading material, Bibles, and religious pamphlets to the men in the field.
Overcrowded camps and unsanitary conditions killed thousands of Georgia Confederate soldiers. In addition, surgeons treated soldiers under conditions that commonly led to deadly infections. More Civil War soldiers died from illness than from battle wounds. The Confederacy established a hospital complex at Ringgold, Georgia. Because of a shortage of male nurses, women stepped in to care for the sick and wounded. Some of the young women of Dade County volunteered for this duty. At first, the women mainly brought food to the patients and wrote and read their letters. Gradually, however, women began to take a more active role by assisting surgeons and changing dressings. After the battle of Chickamauga, some of the less seriously wounded were brought to private homes in Dade County for nursing and convalescence.
In this part of Dade County, the Soldiers Relief Society activities were directed by a young woman named Manerva Redding and her mother. The other women brought the articles they had made to the Redding house and Manerva and her mother delivered them to the Confederate camps.
The above information was found on a historical marker located in front of the house which was placed there by the Chickamauga Campaign Heritage Trail and State of Dade Camp 707, Sons of Confederate Veterans.
Three bracketed photos were taken with a handheld Nikon D7200 and combined with Photomatix Pro to create this HDR image. Additional adjustments were made in Photoshop CS6.
"For I know the plans I have for you", declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future." ~Jeremiah 29:11
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A small helicopter build, not particularly great, but I like it. It's the only one Cayuse model in minifig scale apart from one made by LoganLego I believe. He used flex tube for the canopy, while I tried droid hands at first and then changed to this brick built hunk of trans-clear bricks. I think it doesn't look that bad, and it really helps with balancing the helicopter, long tail and structure behind the skids make it really rear-heavy.