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Mars Base

Satellite Left Stranded by SpaceX Rocket Falls From Space | Space.com - 0 views

www.space.com/ded-satellite-falls-space.html

scibyte67 Orbcomm

shared by Mars Base on 13 Oct 12 - No Cached
  • Orbcomm
  • satellite, launched Oct. 7 into a bad orbit by a Space Exploration Technologies Corp. (SpaceX) Falcon 9 rocket
  • provided enough data to proceed with the launch of the full constellation starting next year.
  • ...12 more annotations...
  • In its statement, Orbcomm suggested that i
  • had enough access to the satellite in less than four days in orbit to validate the performance of its major subsystems.
  • Orbcomm said that, had its satellite been the primary payload on SpaceX’s Oct. 7 flight, the mission would have been a success
  • OG2 satellite bus systems including power, attitude control, thermal and data handling were also tested to verify proper operation
  • The solar array and communications antenna deployments were successful
  • Orbcomm requested that SpaceX carry one of their small satellites
  • few hundred pounds, vs. Dragon at over 12,000 pounds
  • on this flight so that they could gather test data before we launch their full constellation next year.
  • The higher the orbit, the more test data they can gather, so they requested that we attempt to restart and raise altitude
  • NASA agreed to allow that, but only on condition that there be substantial propellant reserves, since the orbit would be close to the space station
  • Orbcomm understood from the beginning that the orbit-raising maneuver was tentative
  • They accepted that there was a high risk of their satellite remaining at the Dragon insertion orbit.
Mars Base

'God particle' discovery poses Nobel dilemma - 0 views

phys.org/...cle-discovery-poses-nobel.html

scibyte66 scibyte67 HiggsBoson

shared by Mars Base on 08 Oct 12 - No Cached
  • But whether the July 4 fireworks will unlock the great prize is unclear.
  • cautious, given that the new particle has not yet been officially sealed as the Higgs.
  • almost certain it is the coveted beast
  • ...14 more annotations...
  • y still need to confirm this
  • s further work to see how it behaves and reacts with other particles
  • there is a remote possibility that the new particle is not the Higgs, although this would be an even more groundshaking announcement.
  • six physicists, each building on the work of others, published a flurry of papers on aspects of the theory within four months of each other back in 1964.
  • The first were Belgians Robert Brout, who died last year, and Francois Englert.
  • followed by Higgs, who was the first to say only a new particle would explain the anomalies of mass
  • further complication is that thousands of physicists worked in the two labs at CERN's Large Hadron Collider near Geneva where Higgs experiments were conducted independently of each other.
  • decide whether theoreticians or experimentalists—or both—should get the glory.
  • At most three names, although they can include organisations, can share a Nobel
  • e prize cannot be given posthumously.
  • The Nobel will "eventually" go to the Higgs
  • s not yet certain that the newly-discovered particle is in fact a Higgs boson
  • nothing stopping us from giving the prize to an organisation. But it has not been the custom in the scientific prizes
  • The Nobel Peace Prize has often been awarded to organisations. But in the science prizes we have tried to find the most prizeworthy individuals
Mars Base

Did NASA's Voyager 1 Spacecraft Just Exit the Solar System? | Space.com - 0 views

www.space.com/r-spacecraft-solar-system.html

scibyte66 scibyte67 Voyager1

shared by Mars Base on 09 Oct 12 - No Cached
  • Scientists are crunching one more set of numbers to find out for sure.
  • New data from the spacecraft indicate that the historic moment of its exit from the solar system might have come and gone two months ago
  • For two years now, data beamed back to Earth by Voyager 1 has hinted at its close approach to the edge of the solar system, a pressure boundary called the heliopaus
  • ...20 more annotations...
  • bubble of electrically charged particles blowing outward from the sun (called the heliosphere) exactly counterbalances the inward pressure of the gas and dust from interstellar space, causing equilibrium between the two
  • scientists have had trouble figuring out what, exactly, happens at or near this boundary — making it hard to tell whether Voyager has crossed it
  • In 2010, Voyager passed the point where the solar wind, a stream of charged particles flowing outward from the sun, seemed to
  • indicated that the wind had suddenly died down, and all the surrounding solar particles were at a standstill
  • "stagnation region" came as a surprise
  • expected to see the solar wind veer sideways
  • the perplexing collapse of the solar wind at the edge of the heliosphere left them without a working model for the outer solar system
  • no well-established criteria of what constitutes exit from the heliosphere
  • "All theoretical models have been found wanting."
  • a space scientist at Johns Hopkins who works with Voyager 1 data, said that in any model of the heliopause, an object exiting through it should experience three changes: a sharp rise in the number of collisions with cosmic rays (high-energy particles from space), a dramatic drop in the number of collisions with charged particles from the sun, and a change in the direction of the surrounding magnetic field.
  • Based on two of those criteria, Voyager 1 looks as if it passed through the heliopause at the end of the summer
  • The level of these cosmic ray collisions jumped significantly in late August.
  • spacecraft has experienced a steady rise in the number of collisions with particles whose energies are greater than 70 Mega-electron-volts, indicating they are probably cosmic rays emanating from supernova explosions far beyond the solar system
  • in late August, cosmic ray collisions sharply rose, and solar particle collisions sharply fell: two indicators of a transition through the heliopause
  • To officially declare Voyager's crossing, the scientists need to check if the third condition holds
  • change in magnetic field direction
  • e interstellar field beyond the influence of the sun) is critical because, even though there is debate among astrophysicists as to what direction the field will lie in
  • unlikely that it is the direction that we have been seeing at Voyager 1 throughout the most recent years
  • scientists could not say when the magnetic field analysis would be finished. But when it is
  • Once we have a consensus within the team we will inform NASA for a proper announcement,
Mars Base

Space Shuttle Endeavour Arrives at Museum Home | Space.com - 0 views

www.space.com/-endeavour-museum-arrival.html

scibyte67 shuttle

shared by Mars Base on 15 Oct 12 - No Cached
  • reached the threshold of the hangar at about 2 p.m. PDT (5:00 p.m. EDT; 2100 GMT), where it was set to enter through the building's temporarily removed rear wall
  • , Endeavour will be hoisted vertical and exhibited with a pair of solid rocket boosters and a replica external fuel tank to re-create how the space shuttle looked before liftoff.
Mars Base

Astronauts Hail Skydiver Felix Baumgartner's Record-Breaking Supersonic Jump | Space.com - 0 views

www.space.com/eaction-felix-baumgartner.html

scibyte67 RedBullStratos

shared by Mars Base on 15 Oct 12 - No Cached
  • " I didn't feel a sonic boom because I was so busy just trying to stabilize myself,"
  • went into a tough spin at the jump's beginning. "It was really a lot harder than I thought it was going to be.
  • Several NASA and ESA astronauts
  • ...1 more annotation...
  • noted that the skydiver was the fourth-highest person near Earth, beat only by the three astronauts living on the International Space Station,
Mars Base

Mars Exploration Rover Mission: The Mission - 0 views

marsrover.nasa.gov/...status.html

scibyte67 opportunity

shared by Mars Base on 13 Oct 12 - No Cached
  • Opportunity is conducting
  • science campaign at a location where orbital observations show the presence of clay minerals
  • rover is positioning near a large, light-toned block of exposed rock outcrop, called "Whitewater Lake."
  • ...5 more annotations...
  • Sol 3092 (Oct. 4, 2012), the rover moved, likely the smallest amount ever, with less than an inch (1 centimeter) of total motion in order to position the robotic arm favorable on a dark-rind surface target
  • n Sol 3094 (Oct. 6, 2012), Opportunity performed a 15-minute brush of a surface target with the Rock Abrasion Tool (RAT)
  • followed with the collection of a Microscopic Imager (MI) mosaic
  • then the placement of the Alpha Particle X-ray Spectrometer (APXS) for an overnight integration
  • Total odometry is 21.78 miles (35,050.07 meters)
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