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April 9 - Today in Science History - Scientists born on April 9th, died, and events - 0 views

  • First astronauts selected
  • In 1959, NASA announced the selection of America's first seven astronauts for project Mercury. Scott Carpenter, Gordon Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard and Donald Slayton were chosen from 110 applicants. Their training program at Langley, which ranged from a graduate-level course in introductory space science to simulator training and scuba-diving. Project Mercury, NASA's first high profile program, was an effort to learn if humans could survive in space. NASA required astronaut candidates to be male, not over 40 years old, not more than 5' 11" height and in excellent physical condition. On 5 May 1961, Shepard became the first American in space
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January 26 - Today in Science History - Scientists born on January 26th, died, and events - 0 views

  • Canadian earthquake   In 1700, an earthquake, the most intense Canada has ever seen, hit the sea floor off the British Columbia coast. Long before Europeans first landed on Vancouver Island, native legend tells of a great disaster. The sea rose in a heaving wave, and landslides buried a sleeping village. Myth was resolved with science in 2003 by government research. Earthquakes of that intensity cause tidal waves, and Japanese written history tells of a massive tsunami striking fishing villages the next day along the coast of Honshu, killing hundreds. Coupled with geological evidence of the level 9 quake, the connection was clear. Mythology and seismology came together to validate history.
Mars Base

Sea turtles 'lost years' mystery starts to unravel - 0 views

  • Small satellite-tracking devices attached to sea turtles swimming off Florida's coast have delivered first-of-its-kind data that could help unlock they mystery of what endangered turtles do during the "lost years."
  • "lost years" refers to the time after turtles hatch and head to sea where they remain for many years before returning to near-shore waters as large juveniles
  • The time period is often referred to as the "lost years" because not much has been known about where the young turtles go and how they interact with their oceanic environment
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  • "Before this study, most of the scientific information about the early life history of sea turtles was inferred through genetics studies, opportunistic sightings offshore, or laboratory-based studies
  • With real observations of turtles in their natural environment, we are able to examine and reevaluate existing hypotheses about the turtles' early life history
  • A team of scientists
  • tracked 17 loggerhead turtles for 27 to 220 days in the open ocean using small, solar-powered satellite tags
  • The goal was to better understand the turtles' movements, habitat preferences, and what role temperature may play in early sea turtle life history
  • While the turtles remain in oceanic waters (traveling between 124 miles to 2,672 miles) off the continental shelf and the loggerhead turtles sought the surface of the water as predicted
  • the study found that the turtles do not necessarily remain within the currents associated with the North Atlantic subtropical gyre
  • . It was historically thought that loggerhead turtles hatching from Florida's east coast complete a long, developmental migration in a large circle around the Atlantic entrained in these currents
  • the team's data suggest that turtles may drop out of these currents into the middle of the Atlantic or the Sargasso Sea.
  • The team also found that while the turtles mostly stayed at the sea surface, where they were exposed to the sun's energ
  • the turtles' shells registered more heat than anticipated (as recorded by sensors in the satellite tags
  • a new hypothesis about why the turtles seek refuge in Sargassum. It is a type of seaweed found on the surface of the water in the deep ocean long associated with young sea turtles.
  • propose that young turtles remain at the sea surface to gain a thermal benefit
  • "This makes sense because the turtles are cold blooded animals. By remaining at the sea surface,
  • by associating with Sargassum habitat, turtles gain a thermal refuge of sorts that may help enhance growth and feeding rates, among other physiological benefits.
  • More research will be needed, but it's a start at cracking the "lost years" myster
  • findings are important because the loggerhead turtles along with other sea turtles are threatened or endangered species
  • Florida beaches are important to their survival because they provide important nesting grounds in North America
  • More than 80% of Atlantic loggerheads nest along Florida's coast
  • There are other important nesting grounds and nursing areas for sea turtles in the western hemisphere found from as far north as Virginia to South America and the Caribbean.
  • "There's a whole lot that happens during the Atlantic crossing that we knew nothing abou
  • r work helps to redefine Atlantic loggerhead nursery grounds and early loggerhead habitat use
Mars Base

MAVEN thunders to Space on Journey to Study Red Planet's Watery History and Potential f... - 0 views

  • NASA’s Mars Atmosphere and Volatile Evolution (MAVEN) space probe thundered to space
  • Nov. 18
  • from Cape Canaveral Air Force Station’s Space Launch Complex 41 at 1:28 p.m. EST atop a powerful Atlas V rocket
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  • It will take the spacecraft 10 months to reach the Red Planet, with arrival scheduled for Sept. 22, 2014
  • MAVEN’s purpose is to accomplish world class science after arriving at Mars and completing a check-out period before it can finally begin collecting science data
  • MAVEN will answer key questions about the evolution of Mars, its geology and the potential for the evolution of life
  • Mars was once wet billions of years ago,
  • Now it’s a cold arid world, not
  • hospitable to life
  • want to determine what were the drivers of that change
  • What is the history of Martian habitability, climate change and the potential for life
  • MAVEN will study Mars upper atmosphere to explore how the Red Planet may have lost its atmosphere over billions of years
  • It will measure current rates of atmospheric loss to determine how and when Mars lost its atmosphere and water
  • The MAVEN probe carries nine sensors in three instrument suites
  • The Particles and Fields Package,
  • contains six instruments to characterize the solar wind and the ionosphere of Mars.
  • The Remote Sensing Package,
  • will determine global characteristics of the upper atmosphere and ionosphere.
  • The Neutral Gas and Ion Mass Spectrometer,
  • will measure the composition of Mars’ upper atmosphere.
  • Over the course of its one-Earth-year primary mission, MAVEN will observe all of Mars’ latitudes at altitudes ranging from 93 miles to more than 3,800 miles.
  • MAVEN will execute five deep dip maneuvers during the first year, descending to an altitude of 78 miles. This marks the lower boundary of the planet’s upper atmosphere.
Mars Base

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

  • Velcro
  • In 1978, Velcro, the hook-and-loop fastener, was released. It was developed by Swiss engineer Georges de Mestral, who noticed how thistle burrs clung to his clothing during a hike in the mountains. Using a microscope, he discovered their natural hook-like shape. From 1948, he worked with a local weaver from a textile plant to design a "locking tape". The important discovery was accidental - that nylon, when sewn under ultraviolet light, formed industructable hooks. Velcro uses two tapes, one with stiff "hooks" like the burrs which clings to the second tape with soft "loops" like the fabric of his pants. The trademarked name Velcro comes from "vel" or velvet and "cro" from the French word crochet which means hook
  • First photo of sun
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  • In 1845, the first surviving daguerrotype photograph showing details of the sun was taken by French physicists Armand Fizeau and Léon Foucault. The 5-inch (12 cm) image had an exposure of 1/60 second, and showed the umbra/penumbra structure of several sunspots, as well as limb darkening. The photographic process was new: Daguerre perfected the daguerrotype only a few years earlier, in 1838. Fizeau and Foucault had been collaborating with their own experiments on the process since 1839. Fizeau had much improved the durability of a daguerrotype image with a treatment, published in Aug 1840, using a solution of chloride of gold mixed with hypo-sulphite of soda, then heated over a spirit-lamp
Mars Base

Opportunity Discovers Clays Favorable to Martian Biology and Sets Sail for Motherlode o... - 0 views

  • Opportunity,
  • has just discovered the strongest evidence to date for an environment favorable to ancient Martian biology
  • Opportunity’s analysis of a new rock target named “Esperance” confirmed that it is composed of a “clay that had been intensely altered by relatively neutral pH water – representing the most favorable conditions for biology that Opportunity has yet seen in the rock histories it has encountered
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  • Water that moved through fractures during this rock’s history would have provided more favorable conditions for biology than any other wet environment recorded in rocks Opportunity has seen
  • Opportunity accomplished the ground breaking new discovery by exposing the interior of Esperance with her still functioning Rock Abrasion Tool (RAT) and examining a pristine patch using the microscopic camera and X-Ray spectrometer on the end of her 3 foot long robotic arm.
  • “Esperance was so important, we committed several weeks to getting this one measurement of it
  • Esperance stems from a time when the Red Planet was far warmer and wetter billions of years ago.
  • made the discovery at the conclusion of a 20 month long science expedition circling around a low ridge called “Cape York”
  • What’s so special about Esperance is that there was enough water not only for reactions that produced clay minerals, but also enough to flush out ions set loose by those reactions
  • Opportunity can clearly see the alteration
  • Esperance is unlike any rock previously investigated by Opportunity; containing far more aluminum and silica which is indicative of clay minerals and lower levels of calcium and iron.
  • Most, but not all of the rocks inspected to date by Opportunity were formed in an environment of highly acidic water
Mars Base

T. K. Mattingly Oral History - 0 views

  • The Race to the Moon book’s description is probably a little better
  • The way back, the spacecraft started drifting off its trajectory, and now they had to make their midcourse corrections to get back
  • turns out that, too, we had practiced in some simulation somewhere. It’s not very accurate, but it doesn’t have to be
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  • It was hard to get people to recognize that we do that, but you don’t need to be the nearest five degrees
  • didn’t solve any problems in the simulator
  • actually ran those procedures, verified them, made some red lines, I think, brought them back over
  • They had to take their flight plan and turn it over and tear out pages and write on the back of it. The only thing they had were pencils and ball pens
  • actually had extra electrical power in the lunar module batteries
  • Somebody came in and found a way to do a jumper cord and take battery power out of the lunar module and top off the command module and to use that power to help get the command module stuff started so we didn’t use all the power from the batteries. So we ended up with a good margin on the batteries
  • Because all our procedures were based on two practical rules. One of them is, structural things don’t break. Actually, that drove everything. Fluid lines and structural—you know, joints can leak, shorts can happen to wires, but physical structure doesn’t break
  • if you admitted to that, then the number of things that you could have to prepare for is infinite.
  • had done a lot of testing of this, a lot of margin of safety in the hardware, so we never looked at those kinds of implications
  • Got in the car to drive back up. This is two days, I think, two days before launch, I think. I’m driving up the road, turned the radio on, and they interrupt the news announcement that this afternoon NASA has announced that they have changed and substituted Jack Swigert for me.
  • Gene says, “Sy, didn’t Jim say that he looked out the window and there’s stuff out in the sky and he heard something?” He says, “Does that sound like instrumentation to you?”
  • thanks to the kind of simulation training program we had, maybe the things weren’t exactly the same or in an exactly the same order, but everything we ended up doing had been done somewhere.
  • somewhere in an earlier sim, there had been an occasion to do what they call LM lifeboat, which meant you had to get the crew out of the command module and into the lunar module, and they stayed there
  • when you get out in space, that all those black spots in between the stars are filled with stars, and those constellations are nowhere near as obvious as they were
  • The guys in the lunar module electrical system had calculated how much time we had, and the two numbers didn’t match. So bringing on this platform is probably the biggest energy user in the spacecraft. Didn’t want to do it
  • They had a capability to maneuver, and they knew where they were, and now they could figure out what to do
  • a big debate about what to do next, as I recall, the books and the movies and all don’t really capture.
  • That debate of what to do next was also rather charged because there was one group of people that said, “You know, this has really been a bad day. We don’t know the condition of any piece of hardware we’ve got. We don’t want to do anything. Don’t touch anything. Let’s just figure this out.”
  • There’s others that said, “There’s only this much electricity and water in the lunar module. We need to turn around and come home as fast as possible.
  • Somewhere in there—I don’t remember all the details—we found out that a family that had gone to a picnic with Charlie and his family over the weekend, one of their kids had the measles, and Charlie was considered exposed
  • One of the many lessons out of all this is starting on day one it was from the very first moment, assume you’re going to succeed and don’t do anything that gets in the way.
  • you had to write down all the numbers in the command module, put them on a list, and then do some math, and then punch the numbers into the lunar module computer
  • you could get a very good alignment so that now you could go in with the lunar module and make a little tweak to tighten up the alignment
  • to get back before the batteries run out
  • while
  • debating what to do with this inertial unit in the command module we had to bring up from scratch, these units are very, very delicate
  • they were allowed to run at a temperature of like 70 plus or minus one. They were tested to see that they would work at plus or minus 10.
  • had one that we don’t know what its temperature is, but we know it’s below freezing
  • didn’t do any testing at those kind of temperatures
  • semi-apocryphal story is that one of the employees at the company
  • had a snowstorm
  • last winter
  • had an IMU in the back of the station wagon
  • took it inside
  • hooked it up and ran it, and they didn’t have any trouble
  • they had had a problem down on the spacecraft, some kind of a problem with detanking the oxygen from the service module
  • took all night and a good bit of the next day
  • to review
  • they’d seen a problem like this before, and even though the regular drain system wasn’t working, they could boil the oxygen out
  • the oxygen tank that we discussed prior to launch was, in fact, the culprit in the explosion. It was damaged in the process that we used in ways that we didn’t anticipate
Mars Base

Fikk meteorittstein gjennom taket i kolonihagen - VG Nett om Utrolige historier - 0 views

Mars Base

Mercury Surprises: Tiny Planet Has Odd Interior, Active Past | Messenger Spacecraft | S... - 0 views

  • interior unlike that of any other rocky planet in our solar system and a surprisingly dynamic history,
  • remained geologically active for a surprisingly large chunk of its evolutionary history, researchers said
  • planet's huge iron core is even larger than they had thought
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  • likely overlain with a solid shell of iron and sulfur
  • layered structure not known to exist on Earth, Venus or Mars
  • Messenger has taken nearly 100,000 images and made more than 4 million measurements of the planet's surface
  • probe is mapping Mercury's surface and gathering data on the planet's composition, magnetic environment and tenuous atmosphere, among other features
  • s original science campaign was designed to last one Earth year
  • NASA announced in November that it had granted the spacecraft a one-year mission extension
  • officially began its extended mission earlier this week.
  • In one study
  • They found that the range of elevations was smaller than that found on either Mars or the moon.
  • also observed that the floors of many Mercury craters have been tilted substantially
  • suggest that internal forces pushed the craters up after the impacts created them
  • not out of the question that Mercury is still active today
  • not very likely
  • have not observed an active eruption or extrusion
  • determined that Mercury has "mascons," large positive gravity anomalies associated with big impact basins
  • first discovered on the moon in 1968 and caused great problems in the Apollo program because they tugged low-orbiting spacecraft around and made navigation difficult
  • Subsequently mascons were discovered on Mars
  • find out that Mercury has
  • appear to be a common feature of terrestrial planetary bodies
  • gravity calculations also suggest that Mercury has an iron core that comprises roughly 85 percent of the planet's radius
  • Earth's iron core covers about half of its radius
  • new findings should help shed light on Mercury's past
  • formation and evolution of rocky planets in general
  • looks like a layer of solid iron sulfide overlies Mercury's core — a feature not known to exist on any other terrestrial planet
Mars Base

January 17 - Today in Science History - Scientists born on January 17th, died, and events - 0 views

  • In 1929, Edwin Hubble communicated the now classic paper that first showed the universe was expanding (and later provided observational evidence for the Big Bang theory).
  • Expanding universe
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January 15 - Today in Science History - Scientists born on January 15th, died, and events - 0 views

  • Spacecrafts dock
  • In 1969, the first docking of two manned spacecraft took place between the Soviet Soyuz 4 and Soyuz 5.
Mars Base

February 1 - Today in Science History - Scientists born on February 1st, died, and events - 0 views

  • Bell Rock Lighthouse
  • the Bell Rock Lighthouse was lit for the first time. Using 24 lanterns, it began flashing its warning light, 11 miles out off the east coast of Scotland atop a white stone tower rising over 30m (100ft) high. It was built by Robert Stevenson on a treacherous sandstone reef, which, except at low tides, lies submerged just beneath the waves. Since then, no repair has been necessary to its stonework. It is the oldest sea-washed lighthouse in existence. It was Stevenson's finest achievement, regarded by many as the finest lighthouse ever built, the most outstanding engineering achievement of the 19th century. In the centuries before, the dangerous Bell Rock had claimed thousands of lives, as vessels were wrecked on its razor-sharp serrated rocks.
Mars Base

February 11 - Today in Science History - Scientists born on February 11th, died, and ev... - 0 views

  • Ceres observation interruption
  • In 1801, Giuseppe Piazzi made a 24th observation of the position of Ceres, the asteroid he discovered between the orbits of Mars and Jupiter, on 1 Jan 1801. It was the first and largest of the dwarf planets now known. After this, it moved into the light of the Sun, and was lost to view for most of the rest of the year. To mathematically relocate Ceres, Carl Gauss, age 24, took up the challenge to calculate its orbital path, based on the limited number of observations available. His method was tedious, requiring 100 hours of calculation. He began with a rough approximation for the unknown orbit, and then used it to produce a refinement, which became the subject of another improvement.. And so on. Astronomers using them found his results in close agreement as they located Ceres again 25 Nov-31 Dec 1801.«
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March 6 - Today in Science History - Scientists born on March 6th, died, and events - 0 views

  • Silly Putty
  • In 1950, Silly Putty was introduced as a toy by Peter Hodgson, a marketing consultant, who packaged one-ounce portions of the rubber-like material in plastic eggs. It could be stretched, rolled into a bouncing ball, or used to transfer colored ink from newsprint. The original discovery was made in 1943 by James Wright who combined silicone oil and boric acid at the laboratories of General Electric. He was researching methods of making synthetic rubber, but at the time no significant application existed for the material. However, it was passed around as a curiosity. Hodgson saw a sample and realized its potential simply for entertainment and coined its name for marketing it as a toy. Its popularity made him a millionaire
Mars Base

Magma Boils Beneath Antarctic Ice | Science/AAAS | News - 0 views

  • Marie Byrd Land is a desolate region of Antarctica buried deep beneath the West Antarctic Ice Sheet
  • Historic eruptions have punctured the ice sheet, creating a chain of volcanoes amid the ice
  • researchers have shown that molten rock still stirs deep underground
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  • Only the largest eruptions could melt all the ice above them and poke through to the surface, but even smaller eruptions could potentially cause global sea level to rise, although no one knows how big the rise might be
  • The crust is thinned by the West Antarctic Rift System, a series of giant rift valleys beneath the ice sheet
  • erupted lava from underground magma chambers has burst through the ice repeatedly over geological history as the plates moved over the top
  • No one knew whether magma was still stirring
  • until seismic monitoring stations were installed on the ice between 2007 and 2010.
  • Researchers built the stations to study the shifting crustal blocks of the West Antarctic Rift System
  • But seismologist
  • found another use
  • They noticed a series of small earthquakes, mainly occurring during two “seismic swarms” in January and February 2010 and March 2011
  • These earthquakes were unusual: The ground was shaking much more slowly during the quakes than one would expect from the plates grinding against each other
  • looked at two different types of waves that come in—the P wave, which is the primary wave, and the S wave, which is the secondary wave
  • calculations revealed that the waves had come from 25 to 40 kilometers below Earth's surface and were centered around a point
  • approximately the point the volcanic activity should have reached if it had continued the linear trend of volcanoes to the south
  • The exact cause of these deep quakes is not understood, but they are thought to result from the movement of magma deep below active or soon-to-be active volcanoes
  • They found that the area showed a slightly higher magnetic field than the surrounding area and that there was a bump in the crust—common signals of magmatic activity
  • Radar mapping also indicated a layer of volcanic ash embedded in the ice
  • probably
  • from an eruption of Mount Waesche about 8000 years ago—very recent geological history
  • There is no evidence of an actual eruption since then, but, because magma is still moving deep under the Earth, an eruption could occur at any time
  • The current center of volcanic activity is covered by at least 1 kilometer of ice, and it would take an exceptionally large eruption to melt all this
  • But an eruption could make its presence felt in subtler ways. As fresh snow adds to their own mass, ice sheets flow downward into the sea
  • melting the base of the ice sheet, an eruption could speed up this flow, potentially raising the level of the ocean. No one knows how significant such a rise might be
  • Any effect on the ice sheet above, and thus any effect on the oceans, would probably be quite small
  • a proper study is needed to find out how significant volcanic activity could be to future sea levels
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