11 fevereiro 2015

M100: A Grand Design Spiral Galaxy



Majestic on a truly cosmic scale, M100 is appropriately known as a grand design spiral galaxy. It is a large galaxy of over 100 billion stars with well-defined spiral arms that is similar to our own Milky Way Galaxy. One of the brightest members of the Virgo Cluster of galaxies, M100 (alias NGC 4321) is 56 million light-years distant toward the constellation of Berenice's Hair (Coma Berenices). This Hubble Space Telescope image of M100 was made in 2009 and reveals bright blue star clusters and intricate winding dust lanes which are hallmarks of this class of galaxies. Studies of variable stars in M100 have played an important role in determining the size and age of the Universe. If you know exactly where to look, you can find a small spot that is a light echo from a bright supernova that was recorded a few years before the image was taken.



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kateoplis:“Deah BarakatDeah Barakat was a 23-year-old dental...

















kateoplis:



Deah Barakat


Deah Barakat was a 23-year-old dental student from Chapel Hill who wanted to use his education to help the less fortunate.


Yusor Mohammed Abu-Salha


Yusor Mohammed Abu-Salha was a 21-year-old North Carolina State University graduate with a biological sciences degree who planned to enter UNC in the fall. She and Barakat were married in December.


Razan Mohammad Abu-Salha


Razan Mohammad Abu-Salha, 19, of Raleigh, was a first year architecture and environmental design at North Carolina State University and the sister of Yusor Mohammad Abu-Salha.”


Remembering the young students killed in the Chapel Hill shooting



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February 11th 1990: Mandela releasedOn this day in 1990, 25...



Mandela in prison





Crowds celebrate his release





Mandela walks free with his wife



February 11th 1990: Mandela released


On this day in 1990, 25 years ago, the famous South African activist and politician Nelson Mandela was released from prison. Mandela had spent twenty-seven years in prison for his role as an anti-apartheid activist at the head of Umkhonto we Sizwe, which translates as Spear of the Nation. The controversial organisation served as the militant armed wing of the African National Congress political party, born out of a frustration among anti-apartheid activists that their non-violence was met with brutality by white authorities against black citizens. Mandela was eventually arrested in 1962 and sentenced to life in prison, during which time he was largely condemned as a terrorist by Western nations. He served most of his twenty-seven years on Robben Island, then Victor Verster Prison near Cape Town, and during his imprisonment his reputation grew as a significant black leader both in South Africa and internationally. Mandela was finally freed after the ban on the ANC was lifted by the apartheid government. Upon his release, Mandela led the ANC in the successful negotiations with President F.W. de Klerk to end apartheid, and was overwhelmingly elected President of South Africa in the first multi-racial elections in 1994, serving until 1999. In 2013, Nelson Mandela died aged 95 and has been mourned around the world as a hero who fought for freedom in South Africa, and as a symbol of resistance for oppressed peoples everywhere.


“Our march to freedom is irreversible. We must not allow fear to stand in our way.”


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solar corona, photographed by stereo a, 26th july 2014.27 images...













solar corona, photographed by stereo a, 26th july 2014.


27 images over 4.5 hours. 1st gif shows frames in sequence; 2nd gif shows each frame plus all the frames before; 3rd gif shows each frame with half the frame before, plus a quarter of the frame before that, plus- etc.


image credit: nasa/stereo. animation: ageofdestruction


age
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The Grifter

Há algum tempo atrás, surgiu, no 4chan (o mesmo site que enraizou várias creepypastas) um vídeo assustador que deixou muitos utilizadores bastante perturbados com o que tinham visto. Não existem muitas informações acerca da criação do vídeo, mas o relato de quem o assistiu alega que é bastante pesado e algumas pessoas até afirmaram que ele estaria ligado a mortes misteriosas, onde no local apareciam sempre bonecas estranhas. As mortes nunca foram confirmadas. Aqui estão alguns dos comentários referentes ao vídeo:



“the_solipsist: eu prefiro não falar sobre isso. só me deixe dizer que foram os piores 2 mins da minha vida…



Anónimo: M**** por que você teve que me lembrar?? M**** de combustível pra pesadelo :( :( sério, aquele vídeo mudou a minha vida



Se tiveres coragem, podes ver o vídeo. Não é recomendado para pessoas com problemas cardíacos ou muito sensíveis e menores de 18 anos. Serás o próximo a encontrar uma boneca?






Não caíram nessa, pois não? Este é mais um daqueles vídeos que prometem causar quase que suicídio por ação de quem o viu, mas que no fim, até serve para dar uma valente gargalhada. Se quiserem ver algo mesmo aterrador, cliquem aqui. Entrem a vosso próprio risco!



via @notiun


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In California, earthquakes always have been relatively common,...

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perks-of-being-chinese:The glow is an indicator of a harmful...













perks-of-being-chinese:



The glow is an indicator of a harmful algal bloom created by something called Noctiluca scintillans, nicknamed Sea Sparkle.



It looks like algae and can act like algae. But it’s not quite. It is a single-celled organism that technically can function as both animal and plant.



These type blooms are triggered by farm pollution that can be devastating to marine life and local fisheries



Noctiluca is a type of single-cell life that eats plankton and is eaten by other species. The plankton and Noctiluca become more abundant when nitrogen and phosphorous from farm run-off increase.



Unlike similar organisms, Noctiluca doesn’t directly produce chemicals that can attack the nervous system or parts of the body. But recent studies show it is much more complicated and links them to blooms that have been harmful to marine life. Noctiluca’s role as both prey and predator can eventually magnify the accumulation of algae toxins in the food chain



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Studying psychology? GO HERE —>...





Studying psychology? GO HERE —> http://ift.tt/1eWNk1f For Comprehensive Psychology Information & Resources.


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biocanvas:Mouse brain blood vesselsWHAT’S THAT?Tissues need...





biocanvas:



Mouse brain blood vessels


WHAT’S THAT?

Tissues need blood to live, and the brain is certainly no exception. But blood vessels are also an entry point for bad things like pathogens and toxins. Enter the blood-brain barrier: Like a bouncer, it allows some things into the brain while preventing entry to others, but it also kicks out a lot of beneficial medicines that need to get into the brain to fix diseases.


WHAT’S THE LATEST?

Science has focused on finding ways to coax the barrier open only for specific drugs, but we simply don’t know enough about how the barrier works yet to do that. Recent research from Harvard Medical School found a gene that controls the barrier’s leakiness through an understudied cell process called transcytosis. Scientists are now working to understand how to use the gene to move drugs into the brain more effectively.


Image by Dr. Ali Erturk/Nikon Small World.



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think-progress:Parents Reportedly Throwing ‘Measles Parties’ To...





think-progress:



Parents Reportedly Throwing ‘Measles Parties’ To Infect Their Unvaccinated Kids



Some parents in California are reportedly considering hosting “measles parties” — social gatherings where unvaccinated children can come into contact with infected kids — to build up their children’s natural resistance to the infectious disease.



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Giant Filament Seen on the Sun



A dark, snaking line across the lower half of the sun in this Feb. 10, 2015 image from NASA's Solar Dynamics Observatory (SDO) shows a filament of solar material hovering above the sun's surface. SDO shows colder material as dark and hotter material as light, so the line is, in fact, an enormous swatch of colder material hovering in the sun's atmosphere, the corona. Stretched out, that line – or solar filament as scientists call it – would be more than 533,000 miles long. That is longer than 67 Earths lined up in a row. Filaments can float sedately for days before disappearing. Sometimes they also erupt out into space, releasing solar material in a shower that either rains back down or escapes out into space, becoming a moving cloud known as a coronal mass ejection, or CME. SDO captured images of the filament in numerous wavelengths, each of which helps highlight material of different temperatures on the sun. By looking at such features in different wavelengths and temperatures, scientists learn more about what causes these structures, as well as what catalyzes their occasional eruptions. Launched on Feb. 11, 2010 aboard a ULA Atlas V rocket from Cape Canaveral Air Force Station, Fla., NASA's Solar Dynamics Observatory is designed to study the causes of solar variability and its impacts on Earth. The spacecraft's long-term measurements give solar scientists in-depth information to help characterize the interior of the sun, the sun's magnetic field, the hot plasma of the solar corona, and the density of radiation that creates the ionosphere of the planets. The information is used to create better forecasts of space weather needed to protect aircraft, satellites and astronauts living and working in space. Image Credit: NASA/SDO



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Wow! Today we’ve got five scientific life hacks!





Wow! Today we’ve got five scientific life hacks!


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npr:Nursing employees suffer 35,000 back and other injuries...









npr:



Nursing employees suffer 35,000 back and other injuries nearly every year. But many career-ending injuries could be prevented if hospitals brought in new technology and taught “safe patient handling.”


Hospitals Fail To Protect Nursing Staff From Becoming Patients


Credit: Lydia Emmanouilidou and Alyson Hurt/NPR



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