Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




SOLAR SCIENCE
40 year old Mariner 5 solar wind problem finds answer
by Staff Writers
Warwick, UK (SPX) Aug 31, 2011


Mariner 5.

Research led by astrophysicists at the University of Warwick has resolved a 40 year old problem with observations of turbulence in the solar wind first made by the probe Mariner Five. The research resolves an issue with what is by far the largest and most interesting natural turbulence lab accessible to researchers.

Our current understanding tells us that turbulence in the solar wind should not be affected by the speed and direction of travel of that solar wind. However when the first space probes attempted to measure that turbulence they found their observations didn't quite match that physical law.

The first such data to be analysed from Mariner 5 in 1971 found a small but nonetheless irritatingly clear pattern in the turbulence perpendicular to both the direction of the travel and the magnetic field the solar wind was travelling through.

While it was an irritating aberration the affect was relatively small and has been essentially ignored by physicists until now.

However the most recent space missions to look at the solar wind, such as the Cluster mission, are examining it with such sensitive and highly accurate modern instrumentation that what was once a small aberration was threatening to become a significant stumbling block to us getting a deeper understanding of what is going on in the solar wind - which is effectively the solar system's largest and most interesting natural turbulence lab.

Research led by Andrew Turner and Professor Sandra Chapman in Centre for Fusion, Space and Astrophysics at the University of Warwick has found a solution to this 40 year old problem.

The research team looked at data from the Cluster mission and they also created a virtual model of how magnetohydrodynamic (MHD) turbulence builds up in the Solar wind.

They then flew a virtual space probe through that virtual model in a range of directions unlike the single direction of travel open to a probe such as Mariner 5.

University of Warwick researcher Andrew Turner said that what they found was that:

"The analysis clearly showed that when all these results were considered together any correlation between changes in the turbulence in the solar wind and the direction of travel simply disappeared. The observed non-axisymmetric anisotropy may simply arise as a sampling effect of using just one probe taking a single particular path through the solar wind."

The research paper, entitled Non-axisymmetric Anisotropy of Solar Wind Turbulence, is published in PRL and is by A.J. Turner, S. Chapman B. Hnat Centre for Fusion, Space and Astrophysics, University of Warwick; G. Gogoberidze, Centre for Fusion, Space and Astrophysics, University of Warwick and the Institute of Theoretical Physics, Ilia State University; and W.C.Muller of the Max-Planck-Institut fur Plasmaphysik.

.


Related Links
Centre for Fusion, Space and Astrophysics
Solar Science News at SpaceDaily






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SOLAR SCIENCE
Space Storm Tracked from Sun to Earth
Huntsville AL (SPX) Aug 24, 2011
For the first time, a spacecraft far from Earth has turned and watched a solar storm engulf our planet. The movie, released during a NASA press conference, has galvanized solar physicists, who say it could lead to important advances in space weather forecasting. "The movie sent chills down my spine," says Craig DeForest of the Southwest Researcher Institute in Boulder, Colorado. "It shows ... read more


SOLAR SCIENCE
Armstrong relives historic Moon landing

NASA's Next Generation Robotic Lander Gets Sideways During Test

Moon Express Gets Thumbs-Up from NASA for Developing New Lunar Landing Technology

NASA Moon Mission in Final Preparations for September Launch

SOLAR SCIENCE
Out of Thin Martian Air

Russian, European space agencies to team up for Mars mission

New Rover Snapshots Capture Endeavour Crater Vistas

France, Russia talk of Mars mission

SOLAR SCIENCE
NASA Aeronautics Is Focus Of Research And Technology Roundtable

New Report Analyzes Development Paths of Emerging Space Nations and Sustainable Use of Outer Space

First Soyuz launch from Kourou to go ahead: Arianespace

Recent grad's astro feats regarded as research crown 'joule'

SOLAR SCIENCE
Orbits for Tiangong

Chinese orbiter launch failure will not affect unmanned space module launch

Rocket malfunction causes satellite to not reach preset orbit

China satellite aborts mission after 'malfunction'

SOLAR SCIENCE
The next ATV resupply spacecraft arrives next mission to ISS

Russia delays next manned space flight

Thales Alenia Space's Cygnus PCM shipped to United States

Resupply Craft Lost While Crew Focuses on Departure and Science

SOLAR SCIENCE
Progress space freighter destroyed in atmosphere

Russia to test launch Soyuz rockets before delivering ISS crews

The fifth Ariane 5 of 2011 is ready for integration of its dual-satellite payload

Glonass-M satellite launch postponed for additional check

SOLAR SCIENCE
Greenhouse Effect Could Extend Habitable Zone

A Planet Made of Diamond

Astronomers Find Ice and Possibly Methane on Snow White

Hubble to Target 'Hot Jupiters'

SOLAR SCIENCE
Scientists put a new spin on traditional information technology

HP plans one last production run for the TouchPad

Indian MPs get iPad lessons to cut paperwork

Amazon tablet seen as worthy iPad rival




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement