среда, 27 сентября 2017 г.

Arm Ornament, Arts of Africa, Oceania, and the AmericasMedium:…

Arm Ornament, Arts of Africa, Oceania, and the AmericasMedium:…


Arm Ornament, Arts of Africa, Oceania, and the Americas


Medium: Gold


Museum Purchase, 1891

Metropolitan Museum of Art, New York, NY


http://www.metmuseum.org/art/collection/search/307512


Paccha, Arts of Africa, Oceania, and the AmericasMedium:…

Paccha, Arts of Africa, Oceania, and the AmericasMedium:…


Paccha, Arts of Africa, Oceania, and the Americas


Medium: Ceramic


Rogers Fund, 1986

Metropolitan Museum of Art, New York, NY


http://www.metmuseum.org/art/collection/search/314955


Bust of Nefertiti. Postcard, early 20th century. Signed: D…

Bust of Nefertiti. Postcard, early 20th century. Signed: D…


Bust of Nefertiti. Postcard, early 20th century. Signed: D Vassiliou.


A priest wearing the mask of Anubis, god of…

A priest wearing the mask of Anubis, god of…


A priest wearing the mask of Anubis, god of mummification performing the ‘Opening of the mouth’ ceremony. Painting from the Tomb of Inherkhau (TT359). Ramesside Period, New Kingdom, 20th dynasty, ca. 1189-1077 BC. Deir el-Medina, West Thebes.


Statuette of the goddess Neith (bronze). Third Intermediate…

Statuette of the goddess Neith (bronze). Third Intermediate…


Statuette of the goddess Neith (bronze). Third Intermediate Period, ca. 1070-664 BC. Goddess of war, hunting, weaving, and wisdom, patroness of Sais, wearing the Deshret, the red crown of Lower Egypt.


НАВОДНЕНИЯ И ОПОЛЗНИ В ГОНДУРАСЕПо меньшей мере пять...

НАВОДНЕНИЯ И ОПОЛЗНИ В ГОНДУРАСЕПо меньшей мере пять...









НАВОДНЕНИЯ И ОПОЛЗНИ В ГОНДУРАСЕ


По меньшей мере пять человек погибли и сотни были вынуждены покинуть дома из-за наводнений и схода оползней в Гондурасе, передает агентство Prensa Latina.
Сообщается, что наводнения и оползни стали следствием сильных и продолжительных дождей. Среди погибших есть ребенок.
Как сообщил глава комитета по ЧС (Copeco) Лисандро Росалес, из-за сложившейся ситуации в стране была проведена эвакуация более 670 семей. В агентстве гражданской безопасности сообщили, что в результате последствий сильных дождей были уничтожены десятки домов, три моста и размыта одна из дорог.
Местные синоптики предупредили, что обильные осадки не прекратятся в стране до выходных. В связи с этим Copeco сохранил желтый и зеленый уровни опасности в 11 из 18 департаментов Гондураса.


Двойной удар молнии у побережья острова Хвар (Хорватия,...

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Северное сияние над Ладогой в Ленинградской области.Вечер...

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Вечер 25 сентября 2017.


© Gena Smk


erubes1:Off into the great unknown Follow me:…

erubes1:Off into the great unknown Follow me:…


erubes1:



Off into the great unknown

Follow me: www.instagram.com/erubes1



The Strange Structures of the Saturn Nebula

The Strange Structures of the Saturn Nebula

ESO – European Southern Observatory logo.


27 September 2017



MUSE image of the Saturn Nebula

The spectacular planetary nebula NGC 7009, or the Saturn Nebula, emerges from the darkness like a series of oddly-shaped bubbles, lit up in glorious pinks and blues. This colourful image was captured by the powerful MUSE instrument on ESO’s Very Large Telescope (VLT), as part of a study which mapped the dust inside a planetary nebula for the first time. The map — which reveals a wealth of intricate structures in the dust, including shells, a halo and a curious wave-like feature — will help astronomers understand how planetary nebulae develop their strange shapes and symmetries.



Three-dimensional MUSE view of the Saturn Nebula

The Saturn Nebula is located approximately 5000 light years away in the constellation of Aquarius (The Water Bearer). Its name derives from its odd shape, which resembles everyone’s favourite ringed planet seen edge-on.


But in fact, planetary nebulae have nothing to do with planets. The Saturn Nebula was originally a low-mass star, which expanded into a red giant at the end of its life and began to shed its outer layers. This material was blown out by strong stellar winds and energised by ultraviolet radiation from the hot stellar core left behind, creating a circumstellar nebula of dust and brightly-coloured hot gas. At the heart of the Saturn Nebula lies the doomed star, visible in this image, which is in the process of becoming a white dwarf [1].



Annotated image showing features in the Saturn Nebula

In order to better understand how planetary nebulae are moulded into such odd shapes, an international team of astronomers led by Jeremy Walsh from ESO used the Multi Unit Spectroscopic Explorer (MUSE) to peer inside the dusty veils of the Saturn Nebula. MUSE is an instrument installed on one of the four Unit Telescopes of the Very Large Telescope at ESO’s Paranal Observatory in Chile. It is so powerful because it doesn’t just create an image, but also gathers information about the spectrum — or range of colours — of the light from the object at each point in the image.



The Saturn Nebula in the constellation of Aquarius

The team used MUSE to produce the first detailed optical maps of the gas and dust distributed throughout a planetary nebula [2]. The resulting image of the Saturn Nebula reveals many intricate structures, including an elliptical inner shell, an outer shell, and a halo. It also shows two previously imaged streams extending from either end of the nebula’s long axis, ending in bright ansae (Latin for “handles”).



The sky around the Saturn Nebula

Intriguingly, the team also found a wave-like feature in the dust, which is not yet fully understood. Dust is distributed throughout the nebula, but there is a significant drop in the amount of dust at the rim of the inner shell, where it seems that it is being destroyed. There are several potential mechanisms for this destruction. The inner shell is essentially an expanding shock wave, so it may be smashing into the dust grains and obliterating them, or producing an extra heating effect that evaporates the dust.



Looking at the Saturn Nebula in 3D

Mapping the gas and dust structures within planetary nebulae will aid in understanding their role in the lives and deaths of low mass stars, and it will also help astronomers understand how planetary nebulae acquire their strange and complex shapes.


But MUSE’s capabilities extend far beyond planetary nebulae. This sensitive instrument can also study the formation of stars and galaxies in the early Universe, as well as map the dark matter distribution in galaxy clusters in the nearby Universe. MUSE has also created the first 3D map of the Pillars of Creation in the Eagle Nebula (eso1518) and imaged a spectacular cosmic crash in a nearby galaxy (eso1437).
http://www.eso.org/public/news/eso1518/
http://www.eso.org/public/news/eso1437/



Zooming in on the Saturn Nebula

Notes:


[1] Planetary nebulae are generally short-lived; the Saturn Nebula will last only a few tens of  thousands of years before expanding and cooling to such an extent that it becomes invisible to us. The central star will then fade as it becomes a hot white dwarf.


[2] The NASA/ESA Hubble Space Telescope has previously provided a spectacular image of the Saturn Nebula — but, unlike MUSE, it cannot reveal the spectrum at each point over the whole nebula.


More information:


ESO is the foremost intergovernmental astronomy organisation in Europe and the world’s most productive ground-based astronomical observatory by far. It is supported by 16 countries: Austria, Belgium, Brazil, the Czech Republic, Denmark, France, Finland, Germany, Italy, the Netherlands, Poland, Portugal, Spain, Sweden, Switzerland and the United Kingdom, along with the host state of Chile. ESO carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities enabling astronomers to make important scientific discoveries. ESO also plays a leading role in promoting and organising cooperation in astronomical research. ESO operates three unique world-class observing sites in Chile: La Silla, Paranal and Chajnantor. At Paranal, ESO operates the Very Large Telescope and its world-leading Very Large Telescope Interferometer as well as two survey telescopes, VISTA working in the infrared and the visible-light VLT Survey Telescope. ESO is also a major partner in two facilities on Chajnantor, APEX and ALMA, the largest astronomical project in existence. And on Cerro Armazones, close to Paranal, ESO is building the 39-metre Extremely Large Telescope, the ELT, which will become “the world’s biggest eye on the sky”.


Links:


ESOcast 129 Light: The Strange Structures of the Saturn Nebula: http://www.eso.org/public/videos/eso1731a/


Photos of the VLT: http://www.eso.org/public/images/archive/category/paranal/


Photos of MUSE: http://www.eso.org/public/images/archive/search/?adv=&subject_name=MUSE


Press release on first light of MUSE: http://www.eso.org/public/news/eso1407/


Multi Unit Spectroscopic Explorer (MUSE): http://www.eso.org/public/teles-instr/paranal-observatory/vlt/vlt-instr/muse/


Very Large Telescope (VLT): http://www.eso.org/public/teles-instr/paranal/


Images, Videos, Text, Credits: ESO/Richard Hook/Jeremy Walsh/IAU and Sky & Telescope/Digitized Sky Survey 2. Acknowledgement: Davide De Martin/L.Calçada/N. Risinger (skysurvey.org). Music: Astral Electronic.


Best regards, Orbiter.ch


Back to School Resources

Back to School Resources

Need help with your science homework? We’ve got you covered! Here are some out-of-this world (pun intended) resources for your science and space questions.


Let’s take a look…


NASA Space Place


image

From questions like “Why does Saturn have rings?” to games that allow you to explore different galaxies, NASA Space Place has a variety of content for elementary-age kids, parents and anyone who likes science and technology topics. 


Visit the NASA Space Place website or follow @NASASpacePlace on Twitter.


SciJinks


image

Targeting middle-school students and teachers, this NOAA and NASA partnership has games and useful information about weather and other Earth science subjects. 


Visit the SciJinks website or follow @SciJinks on Twitter. 


NASA Education


image

The NASA Education website includes an A-Z list of education opportunities that we offer throughout the year, as well as education programs, events and resources for both students and educators. 


We have a diverse set of resources for multiple age groups:



Visit the NASA Education website or follow @NASAedu on Twitter. 


Want to get NASA Education materials for your classroom? Click HERE


A Year of Education on the International Space Station


image

Although on different crews, astronauts Joe Acaba and Ricky Arnold – both former teachers – will work aboard the International Space Station. K-12 and higher education students and educators can do NASA STEM activities related to the station and its role in our journey to Mars. Click HERE for more. 


Sally Ride EarthKAM


image

Also on the International Space Station, the Sally Ride EarthKAM @ Space Camp allows students to program a digital camera on board the space station to photograph a variety of geographical targets for study in the classroom. 


Registration is now open until Sept. 25 for the Sept. 26-30 mission. Click HERE for more. 


NASA eClips™


image

NASA eClips™ are short, relevant educational video segments. These videos inspire and engage students, helping them see real world connections by exploring current applications of science, technology, engineering and mathematics, or STEM, topics. The programs are produced for targeted audiences: K-5, 6-8, 9-12 and the general public.


Space Operations Learning Center


image

The Space Operations Learning Center teaches school-aged students the basic concepts of space operations using the web to present this educational content in a fun and engaging way for all grade levels. With fourteen modules, there’s lots to explore for all ages.


The Mars Fun Zone


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The Mars Fun Zone is a compilation of Red Planet-related materials that engage the explorer inside every kid through activities, games, and educational moments. 


Fly Away with NASA Aeronautics



Frequent flyer or getting ready to earn your first set of wings? From children’s books for story time to interactive flight games, we’ve got Aeronautics activities for students of all ages that are sure to inspire future scientists, mathematicians and engineers. 


On Pinterest? We have a board that highlights NASA science, technology, engineering and math (STEM) lessons, activities, tools and resources for teachers, educators and parents. 


Check it out here: https://www.pinterest.com/nasa/nasa-for-educators/ 


Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


Friend or Foe Zoonotic diseases – affecting both humans and…

Friend or Foe Zoonotic diseases – affecting both humans and…


Friend or Foe


Zoonotic diseases – affecting both humans and animals – are a global health problem. Around 60% of recently-emerging infectious diseases have spread from wildlife, so finding better to ways to track and control these conditions in animals is critical to preventing epidemics in humans. Current monitoring techniques, such as testing trapped animals and sampling from bushmeat, can be difficult to implement and provide limited access to wild populations. One new proposal to better assess diseases in the wild is to use blood-sucking flies like the tsetse (pictured), harnessing their potential as natural ‘flying syringes’. Researchers tested this idea by analysing the blood meals of thousands of flies in Gabon: they were able to identify which species they had fed on and detect the presence of malarial parasites. As techniques for analysing pathogens in blood continue to improve, blood-sucking flies, so often the cause of devastating diseases, could contribute to an innovative solution.


Written by Emmanuelle Briolat



You can also follow BPoD on Instagram, Twitter and Facebook


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