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Mars Science Laboratory: NASA Mars Rover's View of Possible Westward Route - 0 views

  • NASA's Curiosity Mars rover reached the edge of a dune on Jan. 30 and photographed the valley on the other side, to aid assessment of whether to cross the dune
  • A dune across Dingo Gap is about 3 feet (1 meter) high, tapered off at both sides of the gap between two low scarps
  • Curiosity reached the eastern side of the dune on Jan. 30 and returned images that the rover team is using to guide decisions about upcoming drives
Mars Base

Mars Science Laboratory: Curiosity Mars Rover Checking Possible Smoother Route - 0 views

  • The team operating NASA's Mars rover Curiosity is considering a path across a small sand dune to reach a favorable route to science destinations
  • A favorable route would skirt some terrain with sharp rocks considered more likely to poke holes in the rover's aluminum wheels
  • Accumulation of punctures and rips in the wheels accelerated in the fourth quarter of 2013
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  • the team now drives the rover with added precautions, thoroughly checks the condition of Curiosity's wheels frequently, and is evaluating routes and driving methods that could avoid some wheel damage
  • A dune about 3 feet (1 meter) high spans the gap between two scarps that might be a gateway to a southwestward route over relatively smooth ground
  • The team is using images from the rover to assess whether to cross the dune
  • Other routes have also been evaluated for getting Curiosity from the rover's current location to a candidate drilling site
  • That site lies about half a mile (800 meters) away by straight line, but considerably farther by any of the driving routes assessed
  • This area is appealing because we can see terrain units unlike any that Curiosity has visited so far.
  • To prepare for destinations farther ahead, engineers are using a test rover at JPL to check the rover's ability to tolerate slight slippage on slopes while using its drill
  • With the drill bit in a rock, tests simulating slips of up to about 2 inches (5 centimeters) have not caused damage
  • Other testing at JPL is evaluating possible driving techniques that might help reduce the rate of wheel punctures, such as driving backwards or using four-wheel drive instead of six-wheel drive.
  • Some of the wheel damage may result from the force of rear wheels pushing middle or front wheels against sharp rocks, rather than simply the weight of the rover driving over the rocks
  • rolling your wheeled luggage over a curb, you can feel the difference between trying to push it over the curb or pull it over the curb
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.«
Mars Base

Ceres (dwarf planet) - Wikipedia, the free encyclopedia - 0 views

  • in 1772, first suggested that an undiscovered planet could exist between the orbits of Mars and Jupiter
  • Kepler had already noticed the gap between Mars and Jupiter in 1596.
  • Giuseppe Piazzi at the Academy of Palermo
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  • discovered Ceres on 1 January 1801
  • Instead of a star, Piazzi had found a moving star-like object, which he first thought was a comet
  • Piazzi observed Ceres a total of 24 times, the final time on 11 February 1801, when illness interrupted his observations
  • The information was published in the September 1801
Mars Base

This Week's Sky at a Glance - SkyandTelescope.com - 1 views

  • Thursday, February 6
  • First-quarter Moon
  • Mercury is visible in evening twilight, low in the west-southwest. It fades rapidly
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  • y in the dawn; look southeast
  • s just 4° or 5° from lesser Spica to its lower right.
  • highest in the south around 4 a.m., with Spica now under Mars.
  • the eastern sky in early evening
  • . It crosses nearly overhead (for mid-northern observers) around 9 or 10 p.m
  • ) rises around 1 or 2 a.m. and is high in the south at dawn
  • Regulus in Leo to the Moon's left during evening.
  • "Morning Star" in the dawn; look southeast
  • ) rises around 10 or 11 p.m. now
  • 5° to the right of
  • It crosses nearly overhead (for mid-northern observers) around 9 p.m.
  • rises around 1 a.m. and is highest in the south at dawn.
  • by 28°
  • Wednesday, February 19
  • Go out after 11 tonight, and low in the east-southeast, where the Moon has just risen or is about to rise, you'll find bright, fiery Mars with Spica to its right.
  • Thursday, February 20 As dawn breaks Friday morning the 21st, spot the waning Moon in the south with Saturn to its left. Off to their right are Mars and Spica (out of the frame above).
  • before and during dawn; look southeast. It's at its brightest this week.
  • rises around 10 p.m. now, a fiery blaze 5° or 6° to the right of icy Spica. The two of them are highest in the south around 3 or 4 a.m., with Spica now to Mars's lower right
  • Jupiter
  • high southeast in early evening. It crosses nearly overhead (for skywatchers at mid-northern latitudes) around 8 or 9 p.m.
  • Saturn
  • rises around midnight or 1 a.m. and is highest in the south at the beginning of dawn. By then it's far to the left of Mars and Spica,
  • Venus
  • rises around 10 p.m
  • 6° to the left of icy Spica. The two of them are highest in the south around 3 or 4 a.m., with Spica now lower right of Mar
  • Jupiter
  • e high south during evening
  • Thursday, March 13
  • left of the Moon this evening for Regulus. It's the bottom star in the handle of the Sickle of Leo.
  • Venus
  • "Morning Star" before and during dawn; look southeast.
  • rises around 9 p.m
  • Mars (
  • Spica 5° or 6° to its right
  • highest in the south around 2 a.m., with Spica now lower right of Mars
  • Jupiter
  • overhead during evening
  • Saturn
  • rises around 11 p.m. and is highest in the south before dawn
Mars Base

March 2014 guide to the five visible planets | Astronomy Essentials | EarthSky - 0 views

  • Jupiter sets in the west before dawn’s first light
  • Venus to rise in the east about two hours before sunrise.
  • Venus, for this world will shine at its brilliant best as the morning “star” in mid-February.
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  • Mars shines in
  • coming up around 10 p.m. local time at the month’s end. It is near Spica
  • about two hours before dawn late in the month
  • Saturn is
  • close to local midnight by the end of the month. Saturn climbs to its highest point in the sky at dawn.
  • Venus
  • Venus
  • Mars reaches its highest point for the night
  • 4 a.m. local Daylight Time in early March and 2 a.m. local Daylight Time in late march
  • in the east-southeast around 1 a.m. local Daylight Saving Time in early March, and roughly 11 p.m. local Daylight Time by the end of the month.
  • highest point in the sky shortly before morning dawn
Mars Base

Could Blue Light Help Fight Fatigue? Study - 0 views

  • According to researchers
  • , they've found that exposure to short wavelength, or blue light, during the day can improve alertness and overall performance.
  • previous research has shown that blue light is able to improve alertness during the night, but our new data demonstrates that these effects also extend to daytime
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  • "These findings demonstrate that prolonged blue light exposure during the day has an an alerting effect."
  • researchers measured wavelengths of light that were most effective in warding off fatigue via the development of specialized light equipment
  • compared the effects of blue light exposure to an equal amount of green light on alertness and performance in 16 study participants for 6.5 hours over a day.
  • participants were rated based on how they felt through reaction times that measured electrodes to assess changes going on in the brain due to light exposure.
  • Results showed that participants exposed to blue light consistently rated themselves as less sleepy with quicker reaction times and fewer attention relapses.
  • They also showed changes in brain activity patterns that indicated a more alert state.
  • open up a new range of possibilities for using light to improve human alertness, productivity and safety
  • helping to improve alertness in night workers has obvious safety benefits, day shift workers may also benefit
  • better quality lighting that would not only help them see better but also make them more alert
  • next big challenge is to determine how to deliver better lighting in many places
  • such as schools, homes and work places that could
  • provide a more productive and alert atmosphere.
Mars Base

How A Simple New Invention Seals A Gunshot Wound In 15 Seconds | Popular Science - 0 views

  • When a soldier is shot on the battlefield
  • A medic must pack gauze directly into the wound cavity, sometimes as deep as 5 inches into the body, to stop bleeding from an artery
  • startup called RevMedx, a small group of veterans, scientists, and engineers who were working on a better way to stop bleeding.
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  • RevMedx recently asked the FDA to approve a pocket-size invention: a modified syringe that injects specially coated sponges into wounds
  • XStat, the device could boost survival
  • by plugging wounds faster and more efficiently than gauze. 
  • early efforts were inspired by Fix-a-Flat foam for repairing tires
  • They bought some ordinary sponges from a hardware store and cut them into 1-centimeter circles
  • Then, they injected the bits of sponge into an animal injury
  • After seeing early prototypes, the U.S. Army gave the team $5 million to develop a finished product
  • The final material would need to be sterile, biocompatible, and fast-expanding
  • The team settled on a sponge made from wood pulp and coated with chitosan, a blood-clotting, antimicrobial substance that comes from shrimp shells
  • To ensure that no sponges would be left inside the body accidentally, they added X-shaped markers that make each sponge visible on an x-ray image.
  • In just 15 seconds, they expand to fill the entire wound cavity, creating enough pressure to stop heavy bleeding
  • Getting the sponges into a wound,
  • proved to be tricky.
  • RevMedx needed a lightweight, compact way to get the sponges deep into an injury
  • 30 millimeter-diameter, polycarbonate syringe that stores with the handle inside to save space
  • To use the applicator, a medic pulls out the handle, inserts the cylinder into the wound, and then pushes the plunger back down to inject the sponges as close to the artery as possible.
  • Three single-use XStat applicators would replace five bulky rolls of gauze in a medic’s kit
  • RevMedx also designed a smaller version of the applicator, with a diameter of 12 millimeters, for narrower injuries
  • Each XStat will likely cost about $100, Steinbaugh says, but the price may go down as RevMedx boosts manufacturing
  • When RevMedx submitted its application to the FDA, the U.S. Army attached a cover letter requesting expedited approval
  • In the future, RevMedx hopes to create biodegradable sponges that don’t have to be removed from the body
  • To cover large injuries, like those caused by land mines, the team is working on an expanding gauze made of the same material as XStat sponges
Mars Base

Brand New Impact Crater Shows Up on Mars - 0 views

  • This image shows a
  • 30-meter-wide crater with a rayed blast zone and far-flung secondary material surrounding
  • Scientists say the impact and resulting explosion threw debris as far as 15 kilometers in distance.
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  • Before and after pictures of this region show the new impact crater formed between July 2010 and May 2012.
  • With MRO’s help, scientists have been able to estimate that Mars gets pummeled with about 200 impacts per year, but most are much smaller than this new one
Mars Base

Mars Science Laboratory: NASA Mars Rover Curiosity Sees 'Evening Star' Earth - 0 views

  • New images from NASA's Curiosity Mars rover show Earth shining brighter than any star in the Martian night sky
  • even includes our moon, just below Earth
  • The distance between Earth and Mars when Curiosity took the photo was about 99 million miles (160 million kilometers).
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  • The images, taken about 80 minutes after sunset
  • Jan. 31, 2014
Mars Base

The Olympic Torch That Went Around the World… Literally - 0 views

  • Ever since the first relay for the 1936 summer Olympic games in Berlin, Olympic torches have traditionally been used to carry a burning flame
  • from Greece to the host country’s stadium
  • On Nov. 6, 2013 (Nov. 7 UT) a Soyuz TMA-11M rocket launched
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  • the Expedition 38/39 crew to the ISS
  • Along with their mission supplies and personal items, the crew members brought along something special: a torch for the 2014 Olympics.
  • The torch was brought into space two days later
  • during an EVA on Nov. 9, and handed off from one cosmonaut to the other in a symbolic relay in orbit
  • “symbolic” because the torch was not lit during its time aboard the ISS or, obviously, while in space
  • the ISS travels around the Earth 16 times each day, and the torch spent nearly four days in space
  • it will be that particular spacefaring torch that will be used to light the 2014 Olympic cauldron during the Opening Ceremony in Sochi on Feb. 7.
Mars Base

You are Here! Curiosity's 1st Photo of Home Planet Earth from Mars - 0 views

  • Earth shines
  • in the Martian twilight sky
  • “A human observer with normal vision, if standing on Mars, could easily see Earth and the moon as two distinct, bright “evening stars,” said NASA
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  • Curiosity used both of her high resolution color mast mounted cameras to collect a series of Earth/Moon images
  • Processing has removed the numerous cosmic ray strikes
  • these are not the first images of the Earth from Mars orbit or Mars surface
  • NASA’s Mars Exploration Rover Spirit imaged Earth from the surface in March 2004, soon after landing
  • Mars Global Surveyor in 2003 and Mars Reconnaissance Orbiter in 2007
  • NASA’s Cassini orbiter at Saturn captured the Earth and Moon
  • in 2013
Mars Base

Space Images: A Spectacular New Martian Impact Crater - NASA Jet Propulsion Laboratory - 0 views

  • fresh impact crater dominates this image taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on Nov. 19, 2013.
  • Researchers used HiRISE to examine this site because the orbiter's Context Camera had revealed a change in appearance here between observations in July 2010 and May 2012
  • The crater spans approximately 100 feet (30 meters) in diameter and is surrounded by a large, rayed blast zone
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  • In examining ejecta's distribution, scientists can learn more about the impact event
  • The explosion that excavated this crater threw ejecta as far as 9.3 miles (15 kilometers).
  • Before-and-after imaging that brackets appearance dates of fresh craters on Mars has indicated that impacts producing craters at least 12.8 feet (3.9 meters) in diameter occur at a rate exceeding 200 per year globally
Mars Base

February 13 - Today in Science History - Scientists born on February 13th, died, and ev... - 0 views

  • FEBRUARY 13
  • Family Portrait Of The Planets
  • In 1990, the U.S. space probe Voyager I , while heading out to the edge of the Solar System, at 5:12pm PST began a four-hour series of photographs in a look backward which captured the Sun and six planets. An elongated large mozaic was later made by combining about 60 images. In this first “Family Portrait of the Planets”, the Sun appeared almost star-like and the planets were mere dots. Mercury was too close to the sun to photograph. Mars and Pluto, were too small to resolve. This first record of the Solar System from space may remain the only one for decades to follow. Voyager I had a unique lofty perspective, looking down on the plane in which the planets orbit. It had been steadily climbing since it passed Saturn in 1980, and reached an angle of 32 degrees high above the plane of the solar system
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  • ENIAC first operated
  • In 1946, the world's first electronic digital computer, ENIAC (the Electronic Numerical Integrator and Calculator) was first demonstrated at the Moore School of Electrical Engineering at the University of Pennsylvania, by the late John W. Mauchly and J. Presper Eckert. The ENIAC machine occupied a room 30 by 50 feet. Its birth lay in WW II as a classified military project known only as Project PX. The ENIAC is historic because it laid the foundations for the modern electronic computing industry. The ENIAC demonstrated that high-speed digital computing was possible using the vacuum tube technology then available. Built out of some 17,468 electronic vacuum tubes, ENIAC was in its time the largest single electronic apparatus in the world
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