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Mars Base

Mars Science Laboratory: NASA Mars Rover Curiosity Drills Second Rock Target - 0 views

mars.jpl.nasa.gov/...index.cfm

scibyte94 Curiosity

shared by Mars Base on 21 May 13 - No Cached
  • The first was Curiosity's drilling at a target called "John Klein" three months ago
  • Cumberland resembles John Klein and lies about nine feet (2.75 meters) farther west
  • The hole that Curiosity drilled into Cumberland on May 19 is about 0.6 inch (1.6 centimeters) in diameter and about 2.6 inches (6.6 centimeters) deep
  • ...3 more annotations...
  • The science team expects to use analysis of material from Cumberland to check
  • Preliminary findings from analysis of
  • rock powder by Curiosity's onboard laboratory instruments indicate that the location long ago had environmental conditions favorable for microbial life
Mars Base

Mars Science Laboratory: Images - 0 views

mars.jpl.nasa.gov/...images

scibyte94 Curiosity

shared by Mars Base on 21 May 13 - No Cached
  • This pair of images from the Mars Hand Lens Imager (MAHLI) on NASA's Mars rover Curiosity shows the rock target "Cumberland" before and after Curiosity drilled into it to collect a sample for analysis
  • The "before" image was taken during the 275th Martian day, or sol, of Curiosity's work on Mars (May 15, 2013).
  • Curiosity drilled into Cumberland on Sol 279 (May 19, 2013) and took the second image later that same sol.
Mars Base

Wireless signals could transform brain trauma diagnostics - 0 views

medicalxpress.com/...-brain-trauma-diagnostics.html

scibyte94 brain

shared by Mars Base on 15 May 13 - No Cached
  • New technology
  • is using wireless signals to provide real-time, non-invasive diagnoses of brain swelling or bleeding.
  • The device analyzes data from low energy, electromagnetic waves, similar to the kind used to transmit radio and mobile signals
  • ...15 more annotations...
  • The technology
  • could potentially become a cost-effective tool for medical diagnostics and to triage injuries in areas where access to medical care, especially medical imaging, is limited
  • The researchers tested a prototype in a small-scale pilot study of healthy adults and brain trauma patients admitted to a military hospital for the Mexican Army
  • The results from the healthy patients were clearly distinguishable from those with brain damage, and data for bleeding was distinct from those for swelling
  • symptoms of serious head injuries and brain damage are not always immediately obvious, and for treatment, time is of the essence.
  • The researchers took advantage of the characteristic changes in tissue composition and structure in brain injuries
  • For brain edemas, swelling results from an increase in fluid in the tissue
  • For brain hematomas, internal bleeding causes the buildup of blood in certain regions of the brain.
  • Because fluid conducts electricity differently than brain tissue, it is possible to measure changes in electromagnetic properties.
  • Computer algorithms interpret the changes to determine the likelihood of injury.
  • The study involved 46 healthy adults, ages 18 to 48, and eight patients with brain damage, ages 27 to 70.
  • engineers fashioned two coils into a helmet-like device, fitted over the heads of the study participants
  • One coil acts as a radio emitter and the other serves as the receiver. Electromagnetic signals are broadcast through the brain from the emitter to the receiver
  • the waves are extremely weak, and are comparable to standing in a room with the radio or television turned on
  • The device's diagnoses for the brain trauma patients in the study matched the results obtained from conventional computerized tomography (CT) scans
Mars Base

mars-rover-breaks-us-record-off-planet-driving_2.jpg (JPEG Image, 600 × 1012 pixels) - Scaled (86%) - 0 views

www.scientificamerican.com/...ecord-off-planet-driving_2.jpg

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  • Mars Base on 18 May 13
     
    Comparisons among the distances driven by various wheeled vehicles on the surface of Earth's moon and Mars | Image: NASA/JPL-Caltech
Mars Base

Mars Rover Breaks U.S. Record for Off-Planet Driving: Scientific American - 0 views

www.scientificamerican.com/article.cfm

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  •  Opportunity rover drove 263 feet (80 meters) on
  • (May 15), bringing its total odometry on the Red Planet to 22.220 miles (35.760 kilometers
  • Opportunity still trails another robot for the international distance record
  • ...7 more annotations...
  • The Soviet Union's remote-controlled Lunokhod 2 rover traveled 23 miles (37 km) on the moon in 1973.
  • golf-cart-size Opportunity
  • landed on Mars in January 2004 on three-month missions to search for signs of past water activity on the Red Planet
  • Spirit stopped communicating with Earth in 2010 and was declared dead a year later
  • Opportunity had been working at a section of the rim dubbed "Cape York" since the middle of 2011
  • this week it began trekking toward an area called Solander Point, which lies 1.4 miles (2.2 km) away
  • Opportunity's handlers have said they'd like to add this milestone to the rover's resume, though science remains the mission's top priority
Mars Base

Nine-Year-Old Mars Rover Passes 40-Year-Old Record - NASA Jet Propulsion Laboratory - 0 views

www.jpl.nasa.gov/...news.php

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  • Apollo 17 astronauts
  • for three days in December 1972
  • drove their mission's Lunar Roving Vehicle 19.3 nautical miles (22.210 statute miles or 35.744 kilometers
Mars Base

Researchers identify target to prevent hardening of arteries - 0 views

medicalxpress.com/...013-05-hardening-arteries.html

scibyte94 atherosclerosis

shared by Mars Base on 17 May 13 - No Cached
  • Mars Base on 17 May 13
     
    atherosclerosis
Mars Base

Kepler Planet-Hunting Mission in Jeopardy - 0 views

www.universetoday.com/...net-hunting-mission-in-jepardy

scibyte94 Kepler

shared by Mars Base on 16 May 13 - No Cached
  • NASA’s Kepler telescope has lost its ability to precisely point toward stars
  • One of the reaction wheels –devices which enable the spacecraft to aim in different directions without firing thrusters – has failed
  • last year reaction wheel #2 failed, and now #4 has failed
  • ...20 more annotations...
  • Kepler
  • needs at least three reaction wheels to be able to point precisely enough to hunt for planets orbiting distant stars
  • that doesn’t require such precise pointing abilities
  • Last year, NASA had approved an extended mission for Kepler through 2016
  • Initially, they did see some movement on the wheel
  • but it quickly went back
  • have a few things to try
  • get wheel #4 working again
  • they are currently using thrusters to stabilize the spacecraft, and in its current mode, the onboard fuel will last for several months
  • a “Point Rest State,”
  • would extend the fuel to last a period of several years
  • where we can park the vehicle
  • Point Rest State is a loosely-pointed, thruster-controlled state that minimizes fuels usage while providing a continuous X-band communication downlink
  • software to execute that state was loaded to the spacecraft last week
  • the team completed the upload of the parameters the software will use
  • there is the possibility of the wheel running in the opposite direction, but running the wheel backward would mean they would need to use more thruster fuel
  • reaction wheels try to balance the forces from the solar pressure, that’s what forces a wheel to run
  • Earlier this year, elevated friction was detected in reaction wheel #4
  • even if the Kepler spacecraft is unable to make more observations, there are still terabytes of data to pore over
  • have two years of data that has yet to be searched through
Mars Base

Malfunction Could Mark the End of NASA's Kepler Mission - ScienceInsider - 0 views

news.sciencemag.org/...tion-could-mark-the-end-o.html

scibyte94 Kepler

shared by Mars Base on 16 May 13 - No Cached
  • Launched in 2009, the Kepler mission completed its 3.5-year planned run last year
  • monitors some 150,000 sunlike stars in search of transiting planets
Mars Base

Emergency Spacewalk Likely for 'Serious' ISS Coolant Leak - 0 views

www.universetoday.com/...y-for-serious-iss-coolant-leak

scibyte94 iss ViewerFeedback

shared by Mars Base on 19 May 13 - No Cached
  • while the coolant is vital to the operation of the ISS for the electricity-supplying systems, the crew is not in any danger
  • The ammonia cools the 2B power channel, one of eight power channels that control the all the various power-using systems at the ISS
  • All the systems that use power from the 2B channel, the problem area, are being transferred throughout the day to another channel
  • ...2 more annotations...
  • The 2B channel will eventually shut down when the coolant is depleted, and the power is being diverted in order to keep everything up and running on the station
  • While Cassidy and Marshburn prepare in space, Astronauts at NASA’s Johnson Space Center are using the Neutral Buoyancy lab – a 12- meter (40 ft.) deep swimming pool with mockups of the space station that simulates the zero-gravity conditions in space – going through the entire expected EVA
Mars Base

NASA - Astronauts Complete Spacewalk to Repair Ammonia Leak, Station Changes Command - 0 views

www.nasa.gov/...e35_051113_eva.html

scibyte94 iss ViewerFeedback

shared by Mars Base on 19 May 13 - No Cached
  • Expedition 35 Flight Engineers
  • completed a spacewalk
  • to inspect and replace a pump controller box on the International Space Station’s far port truss (P6) leaking ammonia coolant
  • ...5 more annotations...
  • A little more than 2 1/2 hours into the spacewalk
  • removed the 260-pound pump controller box from the P6 truss and replaced it with a spare that had been stowed nearby
  • Spacewalkers practice underwater in the facility and divers provide assistance and dive safety protection during spacewalk simulations
  • The spacewalk is the 168th in support of the assembly and maintenance of the space
  • The device contains the mechanical systems that drive the cooling functions for the port truss.
Mars Base

More Insight on How NASA Might Revive the Kepler Space Telescope - 0 views

www.universetoday.com/...ive-the-kepler-space-telescope

scibyte94 Kepler

shared by Mars Base on 19 May 13 - No Cached
  • there’s still a year and a half’s worth of data in the pipeline that scientists will analyze to identify other candidate planets, and there will continue to be Kepler science discoveries for quite some time
  • There are two possible ways to salvage the spacecraft
  • they could try turning back on the reaction wheel that they shut off a year ago. It was putting metal on metal, and the friction was interfering with its operation
  • ...4 more annotations...
  • could see if the lubricant that is in there, having sat quietly, has redistributed itself, and maybe it will work
  • The other scheme,
  • this has never been tried, involves using thrusters and the solar pressure exerted on the solar panels to try and act as a third reaction wheel and provide additional pointing stability
  • Kepler carries a photometer, not a camera, that looks at the brightness of stars, and so its optics deliberately defocus light from stars to create a nice spread of light on the detector, which is not ideal for spotting asteroids
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