1. reblogged: 8bitfuture

    8bitfuture:

This is the sunshield on NASA’s James Webb Space Telescope.
This test unit was unfurled to full-size for the first time last week and “worked perfectly”, according to NASA.

The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the Webb telescope will receive a command from Earth to unfold, and separate the Sunshield’s five layers into their precisely stacked arrangement with its kite-like shape.
The Sunshield test unit was stacked and expanded at a cleanroom in the Northrop Grumman facility in Redondo Beach, California.
The Sunshield separates the observatory into a warm sun-facing side and a cold side where the sunshine is blocked from interfering with the sensitive infrared instruments. The infrared instruments need to be kept very cold (under 50 K or -370 degrees F) to operate.   The Sunshield protects these sensitive instruments with an effective sun protection factor or SPF of 1,000,000 (suntan lotion generally has an SPF of 8-50).
In addition to providing a cold environment, the Sunshield provides a thermally stable environment. This stability is essential to maintaining proper alignment of the primary mirror segments as the telescope changes its orientation to the sun.

    8bitfuture:

    This is the sunshield on NASA’s James Webb Space Telescope.

    This test unit was unfurled to full-size for the first time last week and “worked perfectly”, according to NASA.

    The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the Webb telescope will receive a command from Earth to unfold, and separate the Sunshield’s five layers into their precisely stacked arrangement with its kite-like shape.

    The Sunshield test unit was stacked and expanded at a cleanroom in the Northrop Grumman facility in Redondo Beach, California.

    The Sunshield separates the observatory into a warm sun-facing side and a cold side where the sunshine is blocked from interfering with the sensitive infrared instruments. The infrared instruments need to be kept very cold (under 50 K or -370 degrees F) to operate.   The Sunshield protects these sensitive instruments with an effective sun protection factor or SPF of 1,000,000 (suntan lotion generally has an SPF of 8-50).

    In addition to providing a cold environment, the Sunshield provides a thermally stable environment. This stability is essential to maintaining proper alignment of the primary mirror segments as the telescope changes its orientation to the sun.

     
  2. Jul 30th, 2014     sciencespaceastronomynasasunshieldsolarjames webb space telescope
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  3. reblogged: shychemist

    compoundchem:

A look today at the chemicals behind insect repelling sprays.Read more here, including a possible reason why mosquitos just prefer some people more than others: http://wp.me/p4aPLT-mS

    compoundchem:

    A look today at the chemicals behind insect repelling sprays.

    Read more here, including a possible reason why mosquitos just prefer some people more than others: 
    http://wp.me/p4aPLT-mS

     
  4. Jul 23rd, 2014     sciencebiologymosquitoeschemistry
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  5. reblogged: science-junkie

    science-junkie:

    This Is What Math Equations Look Like in 3-D

    via wired.com

     
  6. Jul 16th, 2014     sciencemathmath equationsvisualizationdata visualizationmath visualization
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  7. reblogged: afro-dominicano

    Colonies of Growing Bacteria Make Psychedelic Art

    Images: 1) P. vortex exposed to a chemotherapy substance 2) P. vortex 3) Vortex Blue (P. vortex) 4) A close look at P. dendritiformis 5) Bacterial Dragon (Paenibacillus dendritiformis)

    Israeli physicist Eshel Ben-Jacob uses bacteria as an art medium, shaping colonies in petri dishes into bold patterns

    Awesome! Via Smithsonian Magazine

     
  8. Jul 9th, 2014     sciencebiologybacteriaart
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  9. reblogged: running-geek

    thedeadlyclaris:

Beauty of Mathematics by Yann Pineill & Nicolas Lefaucheux

    thedeadlyclaris:

    Beauty of Mathematics by Yann Pineill & Nicolas Lefaucheux

     
  10. Jul 2nd, 2014     scienceanimationmathematicsbeauty of mathematicsyann pineillnicolas lefaucheux
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  11. reblogged: frontal-cortex

    frontal-cortex:

    The scientific definition of ice is that it has a regular crystalline structure based on the molecule geometry of water, which consists of a single oxygen atom covalently bonded to two hydrogen atoms, or H-O-H. Normal ice has a hexagonal symmetry. However, it shows under polarized light a large variety of forms and colors. Even in samples of ‘normal’ crystalline ice it has diverse manifestations. Normal means ice is crystallized under atmospheric pressure and by temperatures below 0°C. 

    Some samples are shown here. The photography’s are made of ice that was crystalized on microscope slides and placed in polarized light.

     
  12. Jun 25th, 2014     scienceicecrystalline structurecrystalphysics
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  13. biomorphosis:

    This is a two-headed albino milksnake [x]. Each head has a brain and able to control over the shared body, causing difficulty in movement. Luckily, they shared the same stomach, snakes with separate stomachs will often fight and bite each other over the prey if one head has prey in its mouth.

    In the wild, two-headed snake lifespan may be restricted significantly for they cannot escape predators well but despite this, two-headed snakes can lived up to 20 years in captivity.

     
  14. Jun 25th, 2014     biologymilksnakesnaketwo-headed snake
    Comments
  15. reblogged: thecraftychemist

    laboratoryequipment:

'Bionic Pancreas' May Revolutionize Diabetes TreatmentScientists have made big progress on a “bionic pancreas” to free some people with diabetes from the daily ordeal of managing their disease. A wearable, experimental device passed a real-world test, constantly monitoring blood sugar and automatically giving insulin or a sugar-boosting drug as needed, doctors say.The device improved blood-sugar control more than standard monitors and insulin pumps did when tested for five days on 20 adults and 32 teens. Unlike other artificial pancreases in development that just correct high blood sugar, this one also can fix too-low sugar, mimicking what a natural pancreas does.Read more: http://www.laboratoryequipment.com/news/2014/06/bionic-pancreas-may-revolutionize-diabetes-treatment

    laboratoryequipment:

    'Bionic Pancreas' May Revolutionize Diabetes Treatment

    Scientists have made big progress on a “bionic pancreas” to free some people with diabetes from the daily ordeal of managing their disease. A wearable, experimental device passed a real-world test, constantly monitoring blood sugar and automatically giving insulin or a sugar-boosting drug as needed, doctors say.

    The device improved blood-sugar control more than standard monitors and insulin pumps did when tested for five days on 20 adults and 32 teens. Unlike other artificial pancreases in development that just correct high blood sugar, this one also can fix too-low sugar, mimicking what a natural pancreas does.

    Read more: http://www.laboratoryequipment.com/news/2014/06/bionic-pancreas-may-revolutionize-diabetes-treatment

     
  16. Jun 18th, 2014     sciencehealthmedicinebiologypancreasblood sugarinsulindiabetes
    Comments
  17. reblogged: skunkbear

    skunkbear:

This just in: spiders tune the silk threads of their webs like guitar strings
… and they use the distinct vibrational frequencies to help them locate meals and mates. Hear the full story of these good vibrations, from NPR’s Christopher Joyce, here. 
And watch our video!:

    skunkbear:

    This just in: spiders tune the silk threads of their webs like guitar strings

    … and they use the distinct vibrational frequencies to help them locate meals and mates. Hear the full story of these good vibrations, from NPR’s Christopher Joyce, here

    And watch our video!:

     
  18. Jun 11th, 2014     sciencephysicsbiologyspiderskunkbearspiderweb
    Comments
  19. reblogged: pennyfornasa

    pennyfornasa:

    commandmodulepilot:

    "I felt red, white and blue all over."

    Astronaut Ed White on his walk in space, quoted in Life magazine, June 25, 1965

    via astronautfilm

     
  20. Jun 4th, 2014     spaceastronautspace explorationed whitelife magazine
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