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Recent News and Articles on the Keywords: voyager + system + solar  Related to the article below (Last Update: 8/5/2008)


Scientific American
Voyaging to the Stars on a Solar Breeze: Space Sail to Take Flight
Scientific American - Jul 30, 2008
... the planets it has passed to speed toward the edge of the solar system at 10.6 miles (17.1 kilometers) per second. Unfortunately, it has taken Voyager 1 ...
It is Confirmed: Water on Mars
NewsBlaze, CA - Aug 2, 2008
NASA missions have revealed the nature of the solar system's building blocks - asteroids, comets and Kuiper Belt objects. Pioneer 10 and 11, Voyager 1 and 2 ...
Voyager 2: Edge of Solar System More Complex Than Predicted
Johns Hopkins Gazette, MD - Jul 21, 2008
The spacecraft has found that exotic particles from outside the solar system dominate the dynamics of this distant region, and that it is far more complex ...
FROM THE COVER Baltimore Sun
all 2 news articles »

Crows Nest
Titan by Ben Bova
Crows Nest - Aug 2, 2008
This was Titan, Saturn's largest satellite, then considered to be the largest moon in the Solar System. Ganymede of Jupiter was later shown to be bigger. ...
NASA Craft To View Solar System's Invisible Frontier
RedOrbit, TX - Jul 28, 2008
At the edge of our solar system in December 2004, the Voyager 1 spacecraft encountered something never before experienced during its then 26-year cruise ...

G4 TV
Solar Sails Might be the Future of Space Travel
G4 TV, CA - Jul 31, 2008
NASA's Voyager One which launched way back in the 70s is now about 10 billion miles from Earth traveling at 10.6 miles per second or 38160 miles per hour. ...
The solar system might be slightly dented, but local stargazers ...
Villages Daily Sun, FL - Jul 14, 2008
In 1977, space probes Voyager 1 and Voyager 2 were launched in different directions toward the edge of the solar system. Voyager 2 encountered the southern ...
Probes: Solar system dented
Dubuque Telegraph Herald, IA - Jul 6, 2008
In 1977, NASA launched two space probes on missions beyond the solar system. Voyager 1 went north and Voyager 2 went south. What startled astronomers is ...
UI scientists observe Solar System breakthrough
UI The Daily Iowan (subscription), IA - Jul 8, 2008
The pair worked together to see the Voyager 2 spacecraft make contact with the solar wind termination shock. The shock is a barrier at the outer edges of ...
STEREO Shows Solar System's Invisible Frontier
RedOrbit, TX - Jul 9, 2008
... solar wind that was discovered last year when Voyager 2 crossed the solar system's termination shock and entered the surrounding heliosheath. ...
Source: Google News

Origin and evolution of fluctuations in the solar wind- Helios observations and Helios-Voyager … -
DA ROBERTS, ML GOLDSTEIN, LW KLEIN, WH MATTHAEUS - Journal of Geophysical Research, 1987 - osti.gov
... Abstract, Using hour-averaged data from the Helios and Voyager spacecraft, we have ...
from 0.3 to 20 AU.^Alfvenic fluctuations in the inner solar system are found ...

The solar system cratering record: Voyager 2 results at Uranus and implications for the origin of … -
RG Strom - Icarus, 1987 - Elsevier
... USA). The solar system cratering record: Voyager 2 results at Uranus and
implications for the origin of impacting objects. Robert ...

Infrared Observations of the Saturnian System from Voyager 1 -
R HANEL, B CONRATH, FM FLASAR, V KUNDE, W MAGUIRE, … - Science, 1981 - sciencemag.org
... During the passage of Voyager 1 through the Saturn system, the infrared instrument ...
for Rhea, which agrees with values for other icy bodies in the solar system. ...

Radio Science Investigations of the Saturn System with Voyager 1: Preliminary Results -
GL TYLER, VR ESHLEMAN, JD ANDERSON, GS LEVY, GF … - Science, 1981 - sciencemag.org
... Investigations of the Saturn System with Voyager 1 ... Voyager 1 radio occultation
measurements of Titan's ... Solar abundance arguments suggest and the measurements ...

[PDF] Micron-Sized Dust Particles Detected in the Outer Solar System by the Voyager 1 and 2 Plasma Wave … -
DA Gumett, JA Ansher, WS Kurth, LJ Granroth - ntrs.nasa.gov
Page 1. U. of Iowa 97-3 Micron-Sized Dust Particles Detected in the Outer Solar
System by the Voyager 1 and 2 Plasma Wave Instruments by ...
-

Radio propagation experiments in the outer solar system with Voyager -
GL Tyler - Proceedings of the IEEE, 1987 - ieeexplore.ieee.org
... Solar System with Voyager ... 1980 and August 26, 1981, respectively [2]-[5]. Voyager
1 is leaving the solar system on a path which carries it well north ...

[PDF] Voyager 1 exited the solar wind at a distance of~ 85 AU from the Sun -
SM Krimigis, RB Decker, ME Hill, TP Armstrong, G … - Nature, 2003 - space.umd.edu
... Izmodenov, VV, Gloeckler, G. & Malama, V. When will Voyager 1 and 2 cross ... H. A five
fluid hydrodynamic approach to model the solar system- interstellar medium ...
-

[CITATION] Uranus System, Solar System and Wave Astrodynamics; Prognosis of Theory and Voyager-2 Observations
AM Chechelnitsky - Doklady AN SSSR, 1988

Interiors of Giant Planets Inside and Outside the Solar System -
T Guillot - Science, 1999 - sciencemag.org
... on the interior structure of the giant planets of our solar system--Jupiter, Saturn ...
of these quantities go back to the Pioneer and Voyager spacecraft missions (1 ...

Geometry of the Saturn System from the 3 July 1989 Occultation of 28 Sgr and Voyager Observations -
RG French, PD Nicholson, ML Cooke, JL Elliot, K … - Icarus, 1993 - Elsevier
... If the a priori Voyager trajectory uncertainties are assumed to be negligible ... precession
rate of Saturn's pole about the invariable pole of the Solar System. ...

Source: Google Scholar

Voyager 2 Proves the Solar System is Squashed
San Francisco, CA. - NASA's Voyager 2 spacecraft has followed its twin Voyager 1 into the solar system's final frontier, a vast region at the edge of our solar system where the solar wind runs up against the thin gas between the stars.
However, Voyager 2 took a different path, entering this region, called the heliosheath, on August 30, 2007. Because Voyager 2 crossed the heliosheath boundary, called the solar wind termination shock, about 10 billion miles away from Voyager 1 and almost a billion miles closer to the sun, it confirmed that our solar system is “squashed” or “dented”– that the bubble carved into interstellar space by the solar wind is not perfectly round. Where Voyager 2 made its crossing, the bubble is pushed in closer to the sun by the local interstellar magnetic field.

“Voyager 2 continues its journey of discovery, crossing the termination shock multiple times as it entered the outermost layer of the giant heliospheric bubble surrounding the Sun and joined Voyager 1 in the last leg of the race to interstellar space.” said Voyager Project Scientist Dr. Edward Stone of the California Institute of Technology, Pasadena, Calif.
The solar wind is a thin gas of electrically charged particles (plasma) blown into space by the sun. The solar wind blows in all directions, carving a bubble into interstellar space that extends past the orbit of Pluto. This bubble is called the heliosphere, and Voyager 1 was the first spacecraft to explore its outer layer, when it crossed into the heliosheath in December 2004. As Voyager 1 made this historic passage, it encountered the shock wave that surrounds our solar system called the solar wind termination shock, where the solar wind is abruptly slowed by pressure from the gas and magnetic field in interstellar space.

Even though Voyager 2 is the second spacecraft to cross the shock, it is scientifically exciting for a couple of reasons. The Voyager 2 spacecraft has a working Plasma Science instrument that can directly measure the velocity, density and temperature of the solar wind. This instrument is no longer working on Voyager 1 and estimates of the solar wind speed had to be made indirectly. Secondly, Voyager 1 may have had only a single shock crossing and it happened during a data gap. But Voyager 2 had at least five shock crossings over a couple of days (the shock “sloshes” back and forth like surf on a beach, allowing multiple crossings) and three of them are clearly in the data. They show us an unusual shock.

In a normal shock wave, fast-moving material slows down and forms a denser, hotter region as it encounters an obstacle. However, Voyager 2 found a much lower temperature beyond the shock than was predicted. This probably indicates that the energy is being transferred to cosmic ray particles that were accelerated to high speeds at the shock.

"The important new data describing the termination shock are still being pondered, but it is clear that Voyager has once again surprised us," said Dr. Eric Christian, Voyager Program Scientist at NASA Headquarters, Washington.

The two Voyager spacecraft will be the only source of local observations of this distant but highly interesting region for years to come. But in the summer of 2008, NASA will be launching a mission specifically designed to globally image the termination shock and heliosheath remotely from Earth orbit. The Interstellar Boundary Explorer (IBEX), led by Dr. David McComas of the Southwest Research Institute in San Antonio, Texas, will use energetic neutral atoms (ENAs) to create all-sky maps at various energies of the interaction of the heliosphere with interstellar space. ENAs are formed when energetic electrically-charged particles “steal” an electron from another particle. Once neutral, they travel straight, unaffected by the solar magnetic field. IBEX will detect some of the particles that happen to be headed towards the Earth, and the number and energy of the particles coming from all different directions will tell us much more about the overall structure of the interaction between the heliosphere and interstellar space.

Results on the Voyager 2 shock crossing from the entire Voyager science team are being presented at the Fall 2007 meeting of the American Geophysical Union in San Francisco. The Voyagers were built by NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, Calif., which continues to operate both spacecraft.
 
 
 
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