понедельник, 25 февраля 2019 г.

2019 February 25 Red Sprite Lightning over Kununurra Image…


2019 February 25


Red Sprite Lightning over Kununurra
Image Credit & Copyright: Ben Broady


Explanation: What are those red filaments in the sky? It is a rarely seen form of lightning confirmed only about 30 years ago: red sprites. Recent research has shown that following a powerful positive cloud-to-ground lightning strike, red sprites may start as 100-meter balls of ionized air that shoot down from about 80-km high at 10 percent the speed of light and are quickly followed by a group of upward streaking ionized balls. The featured image, taken just over a week ago in Kununurra, Western Australia, captured some red sprites while shooting a time-lapse sequence of a distant lightning storm. Pictured, green trees cover the foreground, dark mountains are seen on the horizon, ominous storm clouds hover over the distant land, while red sprites appear in front of stars far in the distance. Red sprites take only a fraction of a second to occur and are best seen when powerful thunderstorms are visible from the side.


∞ Source: apod.nasa.gov/apod/ap190225.html


Data, Data, Data Sets –  Image of the Week – February 25,…


Data, Data, Data Sets –  Image of the Week – February 25, 2019


CCDB:28*http://www.cellimagelibrary.org/images/CCDB_28


Project name: Astrocyte Domains


Description: Investigation of astrocyte morphology and the establishment of unique astrocytic domains.


Leader(s): Eric Bushong


Collaborator(s): Maryann Martone and Mark Ellisman


Attribution Only: This image is licensed under a Creative Commons Attribution License.


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Azurite “Polished Azurite hemisphere” | #Geology…


Azurite “Polished Azurite hemisphere” | #Geology #GeologyPage #Mineral


Locality: Poteryaevskoe Mine, Rubtsovskoe Cu-Zn-Pb deposit, Rudnyi Altai, Altaiskii Krai, Western-Siberian Region, Russia


Size: 36mm x 31mm x 11mm


Photo Copyright © Quebul Fine Minerals


Geology Page

www.geologypage.com

https://www.instagram.com/p/BuRk-r7lpwE/?utm_source=ig_tumblr_share&igshid=1x6rhyqfpv1pq


Wulfenite set with Mimetite on Baryte base | #Geology…


Wulfenite set with Mimetite on Baryte base | #Geology #GeologyPage #Mineral


Locality: Rowley Mine, Theba, Painted Rock District, Painted Rock Mts, Maricopa Co., Arizona, United States


Size: 19mm x 12mm x 11mm


Photo Copyright © Quebul Fine Minerals


Geology Page

www.geologypage.com

https://www.instagram.com/p/BuRnU7ilcZ0/?utm_source=ig_tumblr_share&igshid=1vy4ozp11g4t0


Extinct weasel relative with confounding skull likely ate meat…


Extinct weasel relative with confounding skull likely ate meat with a side of veggies http://www.geologypage.com/2019/02/extinct-weasel-relative-with-confounding-skull-likely-ate-meat-with-a-side-of-veggies.html


Half-a-billion-year-old weird wonder worm finally gets its place…


Half-a-billion-year-old weird wonder worm finally gets its place in the tree of life http://www.geologypage.com/2019/02/half-a-billion-year-old-weird-wonder-worm-finally-gets-its-place-in-the-tree-of-life.html


Diving into Earth’s interior helps scientists unravel secrets of…


Diving into Earth’s interior helps scientists unravel secrets of diamond formation http://www.geologypage.com/2019/02/diving-into-earths-interior-helps-scientists-unravel-secrets-of-diamond-formation.html


South Yarrows Prehistoric Roundhouse Foundations, nr Wick, Caithness, 21.2.19.Now part of...




South Yarrows Prehistoric Roundhouse Foundations, nr Wick, Caithness, 21.2.19.


Now part of an archaeological trail, this hut circle is one of several that are to be found on the edges of the loch.


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Sunhoney Prehistoric Recumbent Stone Circle, Aberdeenshire, Scotland, 20.2.19.

Sunhoney Prehistoric Recumbent Stone Circle, Aberdeenshire, Scotland, 20.2.19.












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South Yarrows Iron Age Broch, nr. Wick, Caithness, 21.2.19.This impressive Iron Age site...











South Yarrows Iron Age Broch, nr. Wick, Caithness, 21.2.19.


This impressive Iron Age site went through several phases of development through the centuries and as a result the central tower is surrounded by additional spaces and structures. Now partially submerged by the loch, the structure hints at its former glory.


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South Yarrows South Chambered Long Cairn, nr Wick, Caithness, 21.2.19.Of all the sites I...











South Yarrows South Chambered Long Cairn, nr Wick, Caithness, 21.2.19.


Of all the sites I visited over the last week, this may have been my favourite. This massive cairn is of similar size to the long cairn at Camster although in a more ruinous state. The cairn clearly had multiple chambers (robbed and collapsed) that ran along the length of the structure but perhaps the most notable feature is the grandiose forecourt structure similar to horned cairns. Although clearly not as ‘tidied’ as Camster, it appears all the more authentic; a startling prehistoric monument and only one of multiple cairns in use at this locale.


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South Yarrows North Chambered Cairn, nr Wick, Caithness, 21.2.19.Far more ruined than its...








South Yarrows North Chambered Cairn, nr Wick, Caithness, 21.2.19.


Far more ruined than its southern counterpart, this cairn appears now as fragmentary stall stones, a collapsed cist and earthworks.


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