воскресенье, 5 августа 2018 г.

Long Division Caenorhabditis elegans worms are often used as a…

Long Division

Caenorhabditis elegans worms are often used as a model for studying biological processes that occur in humans – like cell division. They’re usually hermaphrodites, meaning they’re able to produce both eggs and sperm, which self-fertilise. For organisms to produce eggs and sperm, cells known as germline cells divide by meiosis, a type of cell division unique to germline cells. The sex cells produced each contain half the number of chromosomes found in all other cells, the full complement is restored in the embryo created by fertilisation. Each blue glowing sphere you see is the fluorescently-labelled chromosomes of a germline cell in C. elegans undergoing meiosis. Following their fate allows scientists to better understand how genes are passed from parent to offspring. Problems with meiosis in human reproduction can cause severe birth defects and miscarriage, so understanding meiosis in worms may be the first step towards finding a solution.

This image won the judges choice award at The Art of Research 2018 scientific image competition hosted by Imperial Innovations

Written by Ellie Mclaughlin

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HiPOD (5 August 2018): A Curved Channel in the Mareotis Fossae…

HiPOD (5 August 2018): A Curved Channel in the Mareotis Fossae Region 

   – 287 km above the surface. Black and white is less than 5 km across.

NASA/JPL/University of Arizona


Grey Croft Stone Circle, Cumbria, 4.8.18. A restored and reset…

Grey Croft Stone Circle, Cumbria, 4.8.18.

A restored and reset prehistoric circle.

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Grey Croft Stone Circle, Cumbria, 4.8.18. This is a first visit…

Grey Croft Stone Circle, Cumbria, 4.8.18.

This is a first visit to this site for me. Located close to the Sellafield Nuclear Plant, this is a restored and reset circle. Whilst the stones are not particularly high, the scale is quite substantial. Some stones are either fallen or meant to be recumbent.

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Brunton Turret, Hadrian’s Wall, Northumberland, 2.8.18.Not far…

Brunton Turret, Hadrian’s Wall, Northumberland, 2.8.18.

Not far from Chesters Roman Fort lies Brunton Turret. Whilst in itself it is unremarkable, it provides some indication of the path of the wall and clear foundations of a turret that interspersed the stretch. A milecastle existed every Roman mile (1.48km) and in between each milecastle, equally spaced, there existed two turrets.

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2018 August 5 Trapezium: At the Heart of Orion Image Credit:…

2018 August 5

Trapezium: At the Heart of Orion
Image Credit: Data: Hubble Legacy Archive, Processing: Robert Gendler

Explanation: Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region’s entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a recent dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula’s distance of some 1,500 light-years would make it the closest known black hole to planet Earth.

∞ Source: apod.nasa.gov/apod/ap180805.html


Probing the distant past

Credit: ESA/Hubble & NASA
Acknowledgement: Judy Schmidt (

Obtained for a research programme on star formation in old and distant galaxies, this NASA/ESA Hubble Space Telescope image obtained with its Wide Field Camera 3 (WFC3) demonstrates the immense effects of gravity; more specifically, it shows the effects of gravitational lensing caused by an object called SDSS J1152+3313.

Gravitational lenses — such as this galaxy cluster SDSS J1152+3313 — possess immense masses that wrap their surroundings and bend the light from faraway objects into rings, arcs, streaks, blurs, and other odd shapes. This lens, however, is not only wrapping the appearance of a distant galaxy — it is also amplifying its light, making it appear much brighter than it would be without the lens. Combined with the high image quality obtainable with Hubble, this gives valuable clues into how stars formed in the early Universe.

Star formation is a key process in astronomy. Everything that emits light is somehow connected to stars, so understanding how stars form is key to understanding countless objects lying across the cosmos. Astronomers can probe these early star-forming regions to learn about the sizes, luminosities, formation rates, and generations of different types of stars.

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https://t.co/hvL60wwELQ — XissUFOtoday Space (@xufospace) August 3, 2021 Жаждущий ежик наслаждается пресной водой после нескольких дней в о...