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World Largest Heat Shield Attached to NASA's Orion Crew Capsule for Crucial Fall 2014 T... - 0 views

  • technicians at the Kennedy Space Center (KSC) in Florida have attached the world’s largest heat shield to a pathfinding version of NASA’s Orion crew capsule
  • test flight later this Fall on a crucial mission dubbed Exploration Flight Test-1 (EFT-1)
  • One of the primary goals of NASA’s eagerly anticipated Orion EFT-1 uncrewed test flight is to test the efficacy of the heat shield in protecting the vehicle – and future human astronauts
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  • A trio of parachutes will then unfurl to slow it down for a splashdown in the Pacific Ocean
  • Orion is NASA’s next generation human rated vehicle now under development to replace the now retired space shuttle
  • “The Orion heat shield is the largest of its kind ever built. Its wider than the Apollo and Mars Science Lab heat shields,” Todd Sullivan
  • heat shield senior manager
  • The heat shield measures 16.5 feet in diameter
  • It is constructed from a single seamless piece of Avcoat ablator
  • The ablative material will wear away as it heats up during the capsules atmospheric re-entry thereby preventing the 4000 degree F heat from being transferred to the rest of the capsule
  • The Delta IV Heavy is the only rocket with sufficient thrust to launch the Orion EFT-1 capsule and its attached upper stage to its intended orbit of 3600 miles altitude above Earth
  • 15 times higher than the International Space Station (ISS) and farther than any human spacecraft has journeyed in 40 years
  • At the conclusion of the two-orbit, four- hour EFT-1 flight, the detached Orion capsule plunges back and re-enters the Earth’s atmosphere at 20,000 MPH (32,000 kilometers per hour).
  • “That’s about 80% of the reentry speed experienced by the Apollo capsule after returning from the Apollo moon landing missions,” Scott Wilson, NASA’s Orion Manager of Production Operations
  • The big reason to get to those high speeds during EFT-1 is to be able to test out the thermal protection system
  • Numerous sensors and instrumentation have been specially installed on the EFT-1 heat shield and the back shell tiles to collect measurements of things like temperatures, pressures and stresses during the extreme conditions of atmospheric reentry
  • data gathered during the
  • flight will aid in confirming. or refuting, design decisions and computer models as the program moves forward to the first flight
  • in late 2017 on the EM-1 mission and more human crewed missions thereafter
Mars Base

Lyme Disease Bacteria Found in 15-Million-Year-Old Amber | Paleontology | Sci-News.com - 0 views

  • In 30 years of studying diseases revealed in the fossil record, the scientist has documented the ancient presence of such diseases as malaria, leishmania, and others.
  • Lyme disease
  • can cause problems with joints, the heart and central nervous system
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  • This is the oldest fossil evidence of ticks associated with such bacteria.
Mars Base

Amber discovery indicates Lyme disease is older than human race - 0 views

  • Lyme disease is a stealthy, often misdiagnosed disease that was only recognized about 40 years ago
  • new discoveries of ticks fossilized in amber show that the bacteria which cause it may have been lurking around for 15 million years
  • The findings were made
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  • studied 15-20 million-year-old amber
  • that offer the oldest fossil evidence ever found of Borrelia, a type of spirochete-like bacteria that to this day causes Lyme disease
  • In a related study
  • scientists announced the first fossil record of Rickettsial-like cells, a bacteria that can cause various types of spotted fever
  • it's worth considering that these tick-borne diseases may be far more common than has been historically appreciated
  • Those fossils from Myanmar were found in ticks about 100 million years old.
  • plant and animal life forms found preserved in amber
  • are very efficient at maintaining populations of microbes in their tissues, and can infect mammals, birds, reptiles and other animals
  • "In the United States, Europe and Asia, ticks are a more important insect vector of disease than mosquitos
  • A series of four ticks from Dominican amber were analyzed in this study
  • In a separate report, Poinar found cells that resemble Rickettsia bacteria, the cause of Rocky Mountain spotted fever and related illnesses
  • This is the oldest fossil evidence of ticks associated with such bacteria
  • Evidence suggests that dinosaurs could have been infected with Rickettsial pathogens
Mars Base

35-year-old ISEE 3 Craft Phones Home | Sky & Telescope - 0 views

  • The team successfully established contact that afternoon — notwithstanding a minor earthquake in the area — at a heart-thumping transmission rate of 512 bits per second.
  • approval from NASA to attempt contact, and that go-ahead came on May 29th
Mars Base

Dragon V2: SpaceX's Next Generation Manned Spacecraft | SpaceX - 0 views

  • The vehicle holds seats for 7 passengers, and includes an Environmental Control and Life Support System (ECLSS) that provides a comfortable environment for crewmembers
  • Dragon V2’s robust thermal protection system is capable of lunar missions, in addition to flights to and from Earth orbit
Mars Base

Inside The New Dragon Spacecraft | Popular Science - 0 views

  • the previous version of the Dragon capsule was flightworthy enough to deliver supplies, its life support system wasn’t reliable for human passengers
  • Dragon V2, on the other hand, will be able to carry seven astronauts for seven days.
  • When the capsule reaches the ISS, it will dock with the station autonomously. Unlike its predecessor, it won’t need the ISS’s robotic arm to reach out and grab it
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  • To land back on Earth, version one slowed its speed with parachutes before splashing into the ocean
  • This is now a backup technique for the new capsule
  • V2 can use its engines to land propulsively
  • “You’ll be able to land anywhere on Earth with the accuracy of a helicopter,” SpaceX CEO Elon Musk
  • The Dragon V2’s landing ability will make it quickly reusable
  • According to Ars Technica, NASA pays Russia about $71 million per astronaut for trips to the ISS. Musk thinks he can drop that number to $20 million or less.
Mars Base

June 7 - Today in Science History - Scientists born on June 7th, died, and events - 0 views

  • Ultrasound article
  • In 1958, a seminal article that launched the widespread use of ultrasound in medical diagnosis was published in The Lancet by Ian Donald, an English physician. After a few years developing the experimental use of ultrasound, Donald had applied it to treat patients in his hospital. In the Lancet article, Investigation of Abdominal Masses by Pulsed Ultrasound, he described how he was able to make the life-saving diagnosis of a huge, easily removable, ovarian cyst in a woman who had been diagnosed by others as having inoperable stomach cancer. Donald knew about sonar from his service in WW II, and industrial use of reflected ultrasound waves for flaw detection in materials, and with help from others, he launched its use in medicine
Mars Base

June 6 - Today in Science History - Scientists born on June 6th, died, and events - 0 views

  • Heart defect detection
  • In 1961, the success of a mass-screening field-test for the detection of heart defects in children was announced by the American Heart Association. A child's tape-recorded heart sounds were amplified and filtered, so distinctive murmers and abnormal sounds could be recognized. The system “permits a relatively few trained cardiologists to rapidly screen large numbers of children” and “finds heart disease with an accuracy of 91 percent,” reported the New York Times the next day. From Apr 1959 to Jul 1960, with equipment housed in a trailer and moved between Chicago schools, 33,026 children were recorded. Of these 506 were indentified for further examination, and 64 of those were followed up, some with corrective surgery. Such ailments as rheumatic disease and inborn defects are best treated in childhood.
Mars Base

'Signglasses' System Helps Deaf Literacy - 0 views

  • Students at Brigham Young University recently launched the "Signglasses"
  • project in an attempt to develop a better system of sign language for narration through several types of glasses, including Google Glass.
  • Two of professor
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  • who are also deaf, signed up for the project just as the national Science Foundation funded the research
  • The team tested their system during a field trip visit to the Jean Messieu School for the deaf
  • Research from one of the tests revealed that the signer should be displayed in the center of the lens
  • deaf participants could look straight through the signer as they focused on a planetarium show.
  • This was particularly surprising for researchers as they believed that deaf students would prefer to have a video displayed at the top, as Google Glass normally presents itself
  • Researchers hope that with further studies, this tool can also be used for literary guidance
  • One idea is when you're reading a book and come across a word that you don't understand, you point at it, push a button to take a picture
Mars Base

Using thoughts to control airplanes -- ScienceDaily - 0 views

  • Scientists have now demonstrated the feasibility of flying via brain control -- with astonishing accuracy
  • first breakthrough
  • succeeded in demonstrating that brain-controlled flight is indeed possible -- with amazing precision
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  • Seven subjects took part in the flight simulator tests
  • They had varying levels of flight experience, including one person without any practical cockpit experience whatsoever
  • The accuracy with which the test subjects stayed on course by merely thinking commands would have sufficed, in part, to fulfill the requirements of a flying license test
  • Several of the subjects also managed the landing approach under poor visibility
  • scientists are now focusing in particular on the question of how the requirements for the control system and flight dynamics need to be altered to accommodate the new control method
  • Normally, pilots feel resistance in steering and must exert significant force when the loads induced on the aircraft become too large
  • This feedback is missing when using brain control
  • The researchers are thus looking for alternative methods of feedback to signal when the envelope is pushed too hard, for example
  •  
    Using thoughts to control airplanes
Mars Base

Heavily decorated classrooms disrupt attention and learning in young children -- Scienc... - 0 views

  • materials tend to cover elementary classroom wall
  • new research from Carnegie Mellon University shows that too much
  • may end up disrupting attention and learning in young children
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  • whether classroom displays affected children's ability to maintain focus during instruction and to learn the lesson content
  • They found that children in highly decorated classrooms were more distracted, spent more time off-task and demonstrated smaller learning gains than when the decorations were removed
  • a classroom's visual environment can affect how much children learn
  • do not suggest by any means that this is the answer to all educational problems
  • additional research is needed to know what effect the classroom visual environment has on children's attention and learning in real classrooms
  • consider whether some of their visual displays may be distracting
  • 24 kindergarten students were placed in laboratory classrooms for six introductory science lessons on topics they were unfamiliar with
  • Three lessons were taught in a heavily decorated classroom, and three lessons were given in a sparse classroom.
  • results showed that while children learned in both classroom types, they learned more when the room was not heavily decorated
  • children's accuracy on the test questions was higher in the sparse classroom(55 percent correct) than in the decorated classroom(42 percent correct).
  • when the researchers tallied all of the time children spent off-task in both types of classrooms, the rate of off-task behavior was higher in the decorated classroom (38.6 percent time spent off-task) than in the sparse classroom (28.4 percent time spent off-task)
  • also interested in finding out if the visual displays were removed, whether the children's attention would shift to another distraction
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    Heavily decorated classrooms disrupt attention and learning in young children
Mars Base

Hubble Sees Jupiter's Red Spot Shrink to Smallest Size Ever - 0 views

  • “Recent Hubble Space Telescope observations confirm that the spot is now just under  10,250 miles (16,500 km) across, the smallest diameter we’ve ever measured,” said Amy Simon of NASA’s Goddard Space Flight Cente
  • Using historic sketches and photos from the late 1800s, astronomers determined the spot’s diameter then at 25,475 miles (41,000 km) across
  • Amateur observations starting in 2012 revealed a noticeable increase in the spot’s shrinkage rate
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  • The spot’s “waistline” is getting smaller by just under 620 miles (1,000 km) per year while its north-south extent has changed little
  • the spot has
  • become more circular in shape
  • what causing the drastic downsizing, there are no firm answers yet:
  • new observations
  • very small eddies are feeding into the storm
  • may be responsible for the accelerated change by altering the internal dynamics of the Great Red Spot
  • The Great Red Spot has been a trademark of the planet for at least 400 years
  • a giant hurricane-like storm whirling in the planet’s upper cloud tops with a period of 6 days
  • The storm appears to be conserving angular momentum by spinning faster the same way an ice skater spins up when she pulls in her arms
  • Wind speeds are increasing too, making one wonder whether they’ll ultimately shrink the spot further or bring about its rejuvenation.
Mars Base

This Week's Sky at a Glance, May 23 - 31 | Sky & Telescope - 0 views

  • Wednesday, May 28
  • New Moon
  • (exact at 2:40 p.m. EDT)
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  • Friday, May 30
  • very low in the west-northwest in twilight for the hairline crescent Moon with Mercury to its right. They're far to the lower right of bright Jupiter
  • Saturday, May 31
  • The Moon, Jupiter, and Pollux above them form a nearly straight line in twilight as seen from North America
  • Mercury
  • highest evening apparition of 2014 for skywatchers at mid-northern latitudes,
  • fades this week
  • twilight deepens, look for it in the west-northwest to the lower right of bright Jupiter
  • Venus
  • "Morning Star" low due east during dawn
  • Mars (
  • ighest in the south in late twilight
  • Mars sets in the west around 3 or 4 a.m. daylight saving time
  • Jupiter
  • in the west in twilight
  • sinks during the evening and sets around 11 or midnight.
  • Jupiter is on the far side of the Sun from us
  • nearly its minimum apparent size.
  • Saturn
  • is two weeks past 10th opposition.
  • in the southeast during evening and stands highest in the south around 11 or midnight.
Mars Base

May 29 - Today in Science History - Scientists born on May 29th, died, and events - 0 views

  • Einstein's relativity theory proved
  • In 1919, a solar eclipse permitted observation of the bending of starlight passing through the sun's gravitational field, as predicted by Albert Einstein's theory of relativity. Separate expeditions of the Royal Astronomical Society travelled to Brazil and off the west coast of Africa. Both made measurements of the position of stars visible close to the sun during a solar eclipse. These observations showed that, indeed, the light of stars was bent as it passed through the gravitational field of the sun. This was a key prediction of Albert Einstein's theory that gravity affected energy as in addition to the familiar effect on matter. The verification of predictions of Einstein's theory, proved during the solar eclipse was a dramatic landmark scientific event.
Mars Base

June 2 - Today in Science History - Scientists born on June 2nd, died, and events - 0 views

  • Donati comet
  • In 1858, the Donati Comet was first seen and named after its discoverer, Giovanni Battista Donati, at Florence. It was the second-brightest comet of the nineteenth century It reached perihelion on 30 Sep 1858. When nearest the earth on 9 Oct 1858, it was about 0.5 AU away, and had developed a scimitar-shaped triple tail. At that time, its very prominent dust tail had with an apparent length of 50°, more than half the distance from the horizon to the zenith, a linear distance of over 72 million km (about 45 million mi). It was the first comet to be photographed. With an orbital period estimated at more than 2000 years, it will not return until about the year 4000. An astronomical unit, AU, equals 93 million miles, the Sun-Earth distance.
Mars Base

May 30 - Today in Science History - Scientists born on May 30th, died, and events - 0 views

  • Mars probe
  • In 1971, the U.S. Mars space probe Mariner 9 blasted off from Cape Kennedy, Florida. It carried cameras, infrared spectrometer and radiometer, ultraviolet spectrometer, radio occultation and celestial mechanics instruments. On 13 Nov 1971, it entered orbit as the first artificial satellite of Mars. After waiting for a month-long planet-wide dust storm to clear, it began compiling a global mosaic of high-quality images for 100% of the Martian surface. The photos showed gigantic volcanoes, a grand canyon stretching 4,800 kilometers (3,000 miles) and relics of ancient riverbeds that were carved in the landscape of this seemingly dry and dusty planet. It also sent the first closeup pictures of the two Martian moons, Phobos and Deimos.
Mars Base

May 28 - Today in Science History - Scientists born on May 28th, died, and events - 0 views

  • Mars landing
  • In 1971, the U.S.S.R. Mars 3 was launched. It arrived at Mars on December 2, 1971. The lander was released from the Mars 3 orbiter and became the first spacecraft to land successfully on Mars. It failed after relaying 20 seconds of video data to the orbiter. The Mars 3 orbiter returned data until Aug 1972, sending measurements of surface temperature and atmospheric composition. The first USSR Mars probe was launched 10 Oct 1960, but it failed to reach earth orbit. The next four USSR probes, including Mars 1, also failed. The USA Mariner 3 Mars Flyby attempt in 1964 failed when its solar panels did not open. USA's Mariners 4, 6, and 7 successfully returned Mars photos. Also in 1971, the USSR Mars 2 lander crashed.
  • Animals in space
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  • In 1959, Rhesus monkey Abel and squirrel monkey Baker, both female, were launched for a brief suborbital space flight in the nose cone of Jupiter Missile AM-18. They reached 300 miles altitude, and travelled 1500 miles at speeds over 10,000 mph. Heart rate and sounds, body temperature, blood pressure and radiation were monitored, plus muscle performance by electromyogram. Abel was trained to tap a switch when a red light flashed, to collect data on performance. After the mission, their successful recovery was the first for living beings. The monkeys survived the flight. Afterwards Able died during anesthesia as doctors were about to remove an electrode from under her skin. Baker died of kidney failure in 1984 at age 27.
Mars Base

Images - Mars Science Laboratory - 0 views

  • Mars Hand Lens Imager (MAHLI) on NASA's Curiosity Mars Rover shows the rock target "Windjana" and its immediate surroundings after inspection of the site by the rover
  • The drilling of a test hole and a sample collection hole produced the mounds of drill cuttings that are markedly less red than the other visible surfaces
  • The open hole from sample collection is 0.63 inch (1.6 centimeters) in diameter. It was drilled on Sol 621 (May 5, 2014).
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  • preparatory "mini drill" hole, to lower right from the open hole, was drilled on Sol 615 (April 29, 2014) and subsequently filled in with cuttings from the sample collection drilling.
  • The vigorous activity of penetrating the rock with the rover's hammering drill also resulted in slides of loose material near the rock
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