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Showing posts with label Sky. Show all posts
Showing posts with label Sky. Show all posts

Wednesday, February 08, 2012

Amazing Aurora Australis


After two years of trying to track it down, amateur astronomer Alex Cherney has captured the unadulterated color and beauty of Aurora Australis, also know as the Southern Lights.

On his Vimeo page, Cherney explains that the red color captured in this time lapse "is caused by the charged particles from the sun exciting oxygen atoms high in the Earth's atmosphere."

The incredible scene was captured from Australia's Mornington Peninsula, just outside of Melbourne.

The auroras that occur near the Antarctic circle are called Aurora Australis, as opposed to the Arctic Circle auroras, which are called aurora borealis or the Northern Lights.

A software developer by day, Cherney lives in Melbourne, Australia, and is a member of Mornington Peninsula Astronomical Society, according to his Facebook page.

Saturday, January 28, 2012

The Morning Glory, Rare Meteorological Phenomenon

The Morning Glory cloud is a rare meteorological phenomenon occasionally observed in different locations around the world. The southern part of Northern Australia's Gulf of Carpentaria is the only known location where it can be predicted and observed on a more or less regular basis. The settlement of Burketown attracts glider pilots intent on riding this phenomenon.







Despite being studied extensively, the Morning Glory cloud is not clearly understood.
Regardless of the complexity behind the nature of this atmospheric phenomenon, some conclusions have been made about its causes. Through research, one of the main causes of most Morning Glory occurrences is the mesoscale circulations associated with sea breezes that develop over the peninsula and the gulf. On the large scale, Morning Glories are usually associated with frontal systems crossing central Australia and high pressure in northern Australia. Locals have noted that the Morning Glory is likely to occur when the humidity in the area is high, which provides moisture for the cloud to form, and when strong sea breezes have blown the preceding day.

Funnel cloud is also very interesting and you can also check out this funny cloud post.

Wednesday, May 23, 2007

Lightning Hits A Tree



This is the most amazing lightning strike you will ever see. Lightning hit a tree approximately 20 feet from the camera. The tree died a few months after the strike.

Wednesday, April 04, 2007

Beautiful Pictures From Around The World













Amazing pictures. Enchanted by Photoshop a little bit, but I don't mind. :)

Friday, March 23, 2007

Beautiful Hi Res Aurora Borealis

Eielson Air Force Base, Alaska -- The Aurora Borealis, or Northern Lights, shines above Bear Lake

For more Aurora pictures and video click here and here.

Tuesday, March 06, 2007

Moon Above North Pole

A scene you will probably never get to see in person.
This is the sunset at the North Pole with a Moon at its closest point.

Wednesday, January 10, 2007

Nature From Edna

Nothing like a flower

The end of day

Edna Gartman sent us these beautiful photos. Thanks Edna!

Friday, December 08, 2006

Amazing Sunset


Thanks May for this beautiful picture of sunset.

Saturday, November 04, 2006

Multiple Lightning Strokes









Lightning voltages are usually greater than 20 kV, but can be millions of volts. Researchers and observers have determined that when viewed from a distance, a lightning bolt usually has a question mark shape (?). Most lightning strike occurrences contain multiple strokes. Twenty percent (20%) of these occurrences are only one stroke. Eighty percent (80%) are two or more strokes. The mean stroke occurrence is five to six and the maximum has been measured at twenty-five.
The time between strokes can vary from 100 microseconds to 10 milliseconds during any stroke occurrence.
The current of a lightning strike leader will usually range from 30 to 35 kA. A lightning strike leader is a stream of electrons which appears as a dim spark emerging from a cloud to the ground during the early stages of lightning development. Following the lightning strike leader there may be many multiple-lightning strike occurrences where the average measured lightning strike amplitudes will range from 14 to 40 kA. The duration of the total lightning strike phenomena can have a period between 500 ms and 1 second.
One-third of the second lightning strikes which occurs during multiple lightning strike occurrences are larger in magnitude than the initial strike. The maximum strike intensities (positive and negative) measured were +300 kA and -200 kA. These, however, will occur less than one percent (1%) of the time. The effects of a lightning strike can be measured and the effects felt, 1.2 to 12.5 miles from the strike site. This may be due to lightning currents flowing through the ground. In addition during multiple lightning strikes, the location of the terminating lightning strikes have been observed to vary and may be spaced apart from .2 to 4.5 miles. These data are based on actual measurements. These are long duration current strikes which may last from 10 to 500 ms (30 cycles of 60 Hz lines powers). The amplitude of this long duration strike may range from 10 to 100 amperes and can flow through the power system. This may help to explain why service entrance suppressors sometimes fail during a lightning storm. The long conduction period and the resulting thermal effects can be the consequence of a lightning storm. Since suppressors are transient Voltage devices, the long duration currents may exceed the duty cycle of the device if the device rating is not high enough.

Tuesday, October 17, 2006

Aurora (Northern Lights)

Aurora (Northern Lights)

Aurora borealis in time lapse. Images taken from BC, Canada.

Watch and enjoy! I sure did.

Seeing the Northern Lights (Aurora Borealis) can be absolutely amazing! I love the colors and the movements.

For hi res photos click here!

Tuesday, August 22, 2006

Funnel Cloud



A funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of air and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface. A funnel cloud is usually visible as a cone-shaped or needlelike protuberance from the main cloud base. Funnel clouds frequently form in association with supercell thunderstorms.



If a funnel cloud touches the ground it becomes a tornado. All tornadoes begin as funnel clouds, but many funnel clouds do not make ground contact and so do not become tornadoes. If there is a dust cloud near the ground beneath the funnel or if the funnel contains dust or debris, rather than just condensed water, a tornado exists. Conversely, some tornadoes may appear only as a debris swirl, with no obvious funnel cloud extending below the rotating cloud base.



Todd Snyder sent me this photo. It was taken from just west of Calgary, Alberta.

Saturday, July 15, 2006

Clouds and lightning, pictures by Goran Katic




And few more from Goran Katic. These beautiful photos are uploaded in 1024 x 768 resoulution so you can also use them as wallpaper.

Friday, July 07, 2006

Fire rainbow, natural phenomena


June 19, 2006

It looks like a rainbow that's been set on fire, but this phenomenon is as cold as ice.
Known in the weather world as a circumhorizontal arc, this rare sight was caught on film on June 3 as it hung over northern Idaho near the Washington State border (map of Idaho).
The arc isn't a rainbow in the traditional sense—it is caused by light passing through wispy, high-altitude cirrus clouds. The sight occurs only when the sun is very high in the sky (more than 58° above the horizon). What's more, the hexagonal ice crystals that make up cirrus clouds must be shaped like thick plates with their faces parallel to the ground.
When light enters through a vertical side face of such an ice crystal and leaves from the bottom face, it refracts, or bends, in the same way that light passes through a prism. If a cirrus's crystals are aligned just right, the whole cloud lights up in a spectrum of colors.
This particular arc spanned several hundred square miles of sky and lasted for about an hour, according to the London Daily Mail.

—Victoria Gilman

Saturday, July 01, 2006

Sunset, pictures from Croatia

Croatia is a beautiful small country situated on the Adriatic coast. It is known as the country of a thousand islands and each island have its own unique sunset. Here are some sunsets from islands of Hvar, Brac & Vis.

Hvar

Brac

Vis

Zadar

Finally, one more thing should be said, that is "Zadar has s nicer sunset than California " - so said Alfred Hitchcock in 1964.

Tuesday, June 20, 2006

Heaven through lens





I promised some heavenly photos, didn't I? So here they are. That is the closest that man could get to Heaven through camera.

Monday, June 19, 2006

The sky above us





Many cultures ascribed strong religious qualities to Earth's sky, believing it to be the home of the heavens and various deities. Among the Chinese, in certain situations, sky means god. For example, people may say "They became friends after several fights: this is the idea of the sky" or "Why does the sky always fool me?" Some religion and art historians believe that in Christianity, in particular, the connection between heaven and sky arose because of a medieval painting technique, where different places were drawn separately on the same picture. Heaven, a different and more important world, was usually painted above the earthly world and was separated from it by clouds.

Tomorrow I'll post some heavenly photos. ;)