Analysis photos on Flickr

Of course, 3 years - a very large interval for observing the changes in the nebula. Everything is much faster: www.umanitoba.ca/science/astronomy/cbrown/imaging/hvn/ana...

In 2013-2016 animation, I drew attention to the star just above the nebula, which is for 3 years significantly shifted to the right.

To heighten the effect, combined with the current picture image DSS., For about 60 years, the offset is already pretty decent. olegbr.astroclub.kiev.ua/files/astrofoto/NGC2261/NGC2261_...

Here www.astrosurf.com/mcianci/ngc2261.html Italian colleague calculated that the proper motion (proper motion) of the star 0.2" per year. The name is NLTT 16798 and is listed as High Proper Motion Star: simbad.u-strasbg.fr/simbad/sim-id?Ident=NLTT+16798

Explanation: What causes Hubble's Variable Nebula to vary? The unusual nebula pictured above changes its appearance noticeably in just a few weeks. Discovered over 200 years ago and subsequently cataloged as NGC 2661, the remarkable nebula is named for Edwin Hubble, who studied it earlier this century. Hubble's Variable Nebula is a reflection nebula made of gas and fine dust fanning out from the star R Monocerotis. The faint nebula is about one light-year across and lies about 2500 light-years away towards the constellation of Monocerotis. A leading variability explanation for Hubble's Variable Nebula holds that dense knots of opaque dust pass close to R Mon and cast moving shadows onto the reflecting dust seen in the rest of the nebula. (text:http://apod.nasa.gov/apod/ap991020.html)

This picture was photographed during 4 and 6 February 2016 in Khlepcha observatory, Ukraine.

Equipment: home assembled reflector 10 in., f/3.8

Mount WhiteSwan-180 with a control system «Eqdrive Standart», camera QSI-583wsg, Televue Paracorr-2. Off-axis guidecamera QHY5L-II.

LRGB filter set Baader Planetarium.

L = 29 * 600 seconds , bin.1, RGB = 11 * 300-450 seconds, bin.2 each filter. About 8 hours.

FWHM source in L filter 2.10"-2.97", sum in L channel - 2.55"

The height above the horizon from 40° to 48°, the scale of 1"/ pixel.

Processed Pixinsight 1.8 and Photoshop CS6

Maguari Stork by Thelma Gátuzzô

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The maguari is a large black-and-white stork found in open habitats throughout South America east of the Andes. The sole member of Ciconia in the New World, it was for a good part of the twentieth century placed in its own genus Euxenura, which means 'truly strange tail', a reference to its very short forked tail. Later studies based on behavioral and skeletal traits grouped the current species with Ciconia, a result that was supported by analysis of cytochrome b and DNA-DNA hybridization distances in the Ciconiidae. Within Ciconia, maguari shares the forked tail with a tropical stork from the Old World, asian woolly-necked stork (Ciconia episcopus). doi.org/10.2173/bow.magsto1.02

Picture taken during my last trip to the South of Brasil, at Pelotas, Rio Grande do Sul. Wishing everyone a Peaceful Travel Tuesday!

Thanks a lot for your visits, comments, faves, invites, etc. Very much appreciated!

© All my images are protected under international authors copyright laws and may not be downloaded, reproduced, copied, transmitted or manipulated by any means without my written explicit permission, including the use on websites and similar medias. All rights reserved. Please contact me at thelma.gatuzzo@gmail.com if you intend to buy or use any of my images.

My instagram if you like: @thelmag, @thelma_and_cats and @teg_photo_arts

Member of Nature’s Spirit

Good Stewards of Nature

expression and analysis by edie q

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Created with Mandelbulb 3d. Tweak of a param by dsynegrafix

46043 by Ben Abel

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West Kennet Long Barrow a Neolithic tomb, situated on a prominent chalk ridge, near Silbury Hill, one-and-a-half miles south of Avebury, in Wiltshire.

The site was recorded by John Aubrey in the 17th century and by William Stukeley in the 18th century.

Archaeologists classify it as a chambered long barrow and one of the Severn-Cotswold tombs. It has two pairs of opposing transept chambers and a single terminal chamber used for burial. The stone burial chambers are located at one end of one of the longest barrows in Britain at 100 m: in total it is estimated that 15,700 man-hours were expended in its construction. The entrance consists of a concave forecourt with a facade made from large slabs of sarsen stones which were placed to seal entry.

The construction of the West Kennet Long Barrow commenced about 3600 BC, which is some 400 years before the first stage of Stonehenge, and it was in use until around 2500 BC. The mound has been damaged by indiscriminate digging, but archaeological excavations in 1859 and 1955-56 found at least 46 burials, ranging from babies to elderly persons. The bones were disarticulated with some of the skulls and long bones missing. It has been suggested that the bones were removed periodically for display or transported elsewhere with the blocking facade being removed and replaced each time. Recent re-analysis of the dating evidence suggests that the 46 people all died within 20 – 30 years of each other, and that the tomb was open for 1,000 years.

The latest excavations also revealed that the side chambers occur inside an exact isosceles triangle, whose height is twice the length of its base. Artefacts associated with the burials include Neolithic Grooved ware similar to that found at nearby Windmill Hill.

It is thought that this tomb was in use for as long as 1,000 years and at the end of this period the passage and chamber were filled to the roof by the Beaker people with earth and stones, among which were found pieces of Grooved ware, Peterborough ware and Beaker pottery, charcoal, bone tools, and beads. Stuart Piggott, who excavated this mixture of secondary material, suggested that it had been collected from a nearby 'mortuary enclosure' showing that the site had been used for ritual activity long after it was used for burial. The finds from the site are displayed at the Wiltshire Museum in Devizes, including some of the most impressive beakers from Britain.

Information Source:

en.wikipedia.org/wiki/West_Kennet_Long_Barrow

analysis paralysis by Veronica Schlee

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Mobility analysis by Melancholy_Undone

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True Bug by Ulrich Vogl

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Small "true" bug, about 4-5mm

The tip of the forewing of Heteroptera is fairly thick (~1.2 microns), thus there is no color iridescence visible (brown curve). The base is even thicker and leathary. This is the origin of the name "hemiptera" which means "half-winged". The newer name Heteroptera means also "mixed-wings". This leads to the typical "X" structure of the closed wings in dorsal view, which is an easy means to identify "true" bugs.

Hind wings in contrast, are much thinner (~0.2 microns here), which leads to a brillant blue-violett if illuminated coaxially.

Forewings are shown here

Hind wings

Wing-thickness- analysis goes here

Mitutoyo M Plan Apo 7.5x NA 0.21 tube lens: Thorlabs 165mm

Illumination: Dark field, oblique and UV 365nm (UVIVF, just the eyes show fluorescence)

Analysis by Iritxu Photos

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Nikon D800E, Sigma 85mm f/1.4 DG HSM Art

Iritxu Photos | Link in Bio

gap analysis by d0gwalker

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