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
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Mars Science Laboratory: Curiosity Mars Rover Checking Possible Smoother Route - 0 views
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A favorable route would skirt some terrain with sharp rocks considered more likely to poke holes in the rover's aluminum wheels
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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
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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
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Other routes have also been evaluated for getting Curiosity from the rover's current location to a candidate drilling site
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That site lies about half a mile (800 meters) away by straight line, but considerably farther by any of the driving routes assessed
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This area is appealing because we can see terrain units unlike any that Curiosity has visited so far.
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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
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With the drill bit in a rock, tests simulating slips of up to about 2 inches (5 centimeters) have not caused damage
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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.
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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
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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
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February 11 - Today in Science History - Scientists born on February 11th, died, and ev... - 0 views
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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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Ceres (dwarf planet) - Wikipedia, the free encyclopedia - 0 views
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in 1772, first suggested that an undiscovered planet could exist between the orbits of Mars and Jupiter
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Piazzi observed Ceres a total of 24 times, the final time on 11 February 1801, when illness interrupted his observations
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This Week's Sky at a Glance - SkyandTelescope.com - 1 views
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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.
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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).
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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
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high southeast in early evening. It crosses nearly overhead (for skywatchers at mid-northern latitudes) around 8 or 9 p.m.
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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,
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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
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March 2014 guide to the five visible planets | Astronomy Essentials | EarthSky - 0 views
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close to local midnight by the end of the month. Saturn climbs to its highest point in the sky at dawn.
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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.
Astronomy Essentials | EarthSky - 0 views
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Could Blue Light Help Fight Fatigue? Study - 0 views
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, they've found that exposure to short wavelength, or blue light, during the day can improve alertness and overall performance.
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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."
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researchers measured wavelengths of light that were most effective in warding off fatigue via the development of specialized light equipment
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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.
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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.
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Results showed that participants exposed to blue light consistently rated themselves as less sleepy with quicker reaction times and fewer attention relapses.
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open up a new range of possibilities for using light to improve human alertness, productivity and safety
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helping to improve alertness in night workers has obvious safety benefits, day shift workers may also benefit
Strange Saturn Vortex Swirls in Amazing NASA Photo | Space.com - 0 views
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How A Simple New Invention Seals A Gunshot Wound In 15 Seconds | Popular Science - 0 views
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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
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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
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The team settled on a sponge made from wood pulp and coated with chitosan, a blood-clotting, antimicrobial substance that comes from shrimp shells
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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.
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In just 15 seconds, they expand to fill the entire wound cavity, creating enough pressure to stop heavy bleeding
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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.
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RevMedx also designed a smaller version of the applicator, with a diameter of 12 millimeters, for narrower injuries
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Each XStat will likely cost about $100, Steinbaugh says, but the price may go down as RevMedx boosts manufacturing
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When RevMedx submitted its application to the FDA, the U.S. Army attached a cover letter requesting expedited approval
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In the future, RevMedx hopes to create biodegradable sponges that don’t have to be removed from the body
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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
Vegetables Successfully Grown in International Space Station Greenhouse - 0 views
A Musical Duet From the Edge of Our Solar System - 0 views
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Brand New Impact Crater Shows Up on Mars - 0 views
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Before and after pictures of this region show the new impact crater formed between July 2010 and May 2012.
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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
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Mars Science Laboratory: NASA Mars Rover Curiosity Sees 'Evening Star' Earth - 0 views
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New images from NASA's Curiosity Mars rover show Earth shining brighter than any star in the Martian night sky
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The distance between Earth and Mars when Curiosity took the photo was about 99 million miles (160 million kilometers).
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The Olympic Torch That Went Around the World… Literally - 0 views
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Ever since the first relay for the 1936 summer Olympic games in Berlin, Olympic torches have traditionally been used to carry a burning flame
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Along with their mission supplies and personal items, the crew members brought along something special: a torch for the 2014 Olympics.
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during an EVA on Nov. 9, and handed off from one cosmonaut to the other in a symbolic relay in orbit
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“symbolic” because the torch was not lit during its time aboard the ISS or, obviously, while in space
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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.
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You are Here! Curiosity's 1st Photo of Home Planet Earth from Mars - 0 views
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“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
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NASA’s Mars Exploration Rover Spirit imaged Earth from the surface in March 2004, soon after landing
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Space Images: A Spectacular New Martian Impact Crater - NASA Jet Propulsion Laboratory - 0 views
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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.
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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
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The crater spans approximately 100 feet (30 meters) in diameter and is surrounded by a large, rayed blast zone
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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
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February 13 - Today in Science History - Scientists born on February 13th, died, and ev... - 0 views
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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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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