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Topic: Ulysses probe


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In the News (Mon 21 Dec 09)

  
  The Ulysses Solar Polar Probe
The Ulysses mission is a joint mission with NASA and ESA to explore the solar environment at high ecliptic latitudes.
In addition to its solar environment instruments, Ulysses also carries plasma instruments to study the interstellar and Jovian regions, as well as two instruments for studying X-rays and gamma-rays of both solar and cosmic origins.
Ulysses is the first satellite carrying a gamma burst detector which went outside the orbit of Mars.
heasarc.gsfc.nasa.gov /docs/heasarc/missions/ulysses.html   (482 words)

  
 Ulysses
Ulysses has twice before orbited the Sun’s polar caps, first during a minimum in the number of sunspots and then when the sunspot number was at its maximum.
During the first Ulysses orbit, the Sun’s magnetic poles were positive with outward fields in the north and negative or inward fields in the south.
During Ulysses second orbit at sunspot maximum, the Sun’s polar fields disappeared and then reappeared with the opposite sense, negative or inward in the north and positive or outward in the south.
ulysses.jpl.nasa.gov   (351 words)

  
 ESA - Space Science - Ulysses
Ulysses is the first mission to study the environment of space above and below the poles of the Sun.
Ulysses is providing the first-ever map of the heliosphere from the equator to the poles.
Ulysses has explored the solar wind from all angles, producing the first three-dimensional picture of the heliosphere.
www.esa.int /export/esaSC/120395_index_0_m.html   (949 words)

  
 Space Probes   (Site not responding. Last check: 2007-09-10)
The Ulysses space probe was launched in 1990 by the United States and the European Space Agency, an association of 14 European nations.
The probe showed that the atmosphere of Mars was much thinner than expected, and the surface resembled that of the moon.
Probes that orbited Venus generated rough maps of the planet's surface by bouncing radio waves off the ground.
www.abhisheksood.50megs.com /space_probes.htm   (1680 words)

  
 Ulysses
Ulysses is a solar probe launched in 1990 that has made the first-ever measurements of the Sun from a polar orbit.
The primary objectives of the Ulysses mission encompass the properties of the solar wind, the structure of the Sun/wind interface, the heliospheric magnetic field, solar radio bursts and plasma waves, solar X-rays, solar and galactic cosmic rays, and the interstellar interplanetary neutral gas and dust, all as 3 function of solar latitude.
In addition, Ulysses found a beam of particles from interstellar space that was penetrating the solar system at a velocity of close to 80,000 kilometers per hour (50,000 miles per hour).
www.solarviews.com /eng/ulysses.htm   (1206 words)

  
 Ulysses - Science - Primary Mission Results
Many models of the solar magnetic field used prior to Ulysses assumed that the solar magnetic field was similar to that of a dipole; field lines near the solar equator were thought to form closed loops whereas field lines from the poles were dragged far into interplanetary space by the solar wind.
Ulysses found that the amount of outward magnetic flux in the solar wind did not vary greatly with latitude, indicating the importance of pressure forces near the sun for evenly distributing magnetic flux.
Ulysses established that cosmic ray fluxes are not greatly enhanced in the polar regions because the cosmic rays traveling through the polar regions are scattered by large-amplitude magnetic waves (not shown in the figure) that Ulysses discovered in this region.
ulysses.jpl.nasa.gov /science/mission_primary.html   (829 words)

  
 Ulysses: What's New?
Ulysses arrived over the sun's south polar regions for the second time in November 2000, followed by the rapid transit from maximum southern to maximum northern helio-latitudes that was completed in October 2001.
The Ulysses data from the recent high-latitude passes, in addition to confirming the presence of large fluxes of energetic particles over the poles, have revealed that the absolute intensity of these particles in many events is comparable to that measured simultaneously in the ecliptic near 1 AU.
Ulysses' state-of-the-art instruments were also able to show that the boundary between the fast wind and the slower, more variable wind from the equatorial regions is surprisingly sharp.
helio.estec.esa.nl /ulysses/whatsnew.html   (4978 words)

  
 space probe — FactMonster.com
Instruments carried by space probes include radiometers, magnetometers, and television cameras sensitive to infrared, visible, and ultraviolet light; there also may be special detectors for micrometeors, cosmic rays, gamma rays, and solar wind.
A probe may be directed to orbit a planet, to soft-land instrument packages on a planetary surface, or to fly by as close as a few thousand miles from one or more planets.
The particulars of trajectory and instrumentation of each space probe are tailored around the mission's scientific and technological objectives; the data provided by a single space probe may require months or even years of analysis.
www.factmonster.com /ce6/sci/A0846140.html   (725 words)

  
 Solar Ulysses Mission
Ulysses is a joint mission of the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA)The ESA provided the spacecraft and the team that operates the spacecraft.
The purpose of the Ulysses mission is to investigate the solar magnetic field, solar wind plasma, and galactic cosmic rays coming from the Sun.
The phenomena being studied by the Ulysses mission are strongly influenced by the 11 year solar cycle.
www.windows.ucar.edu /tour/link=/headline_universe/ulindex.html   (311 words)

  
 Ulysses Solar Probe   (Site not responding. Last check: 2007-09-10)
These electrons follow the magnetic field lines from the sun, and their interactions with the plasma of the solar wind generate radio emissions called Type III radio bursts.
Ulysses used a gravity-assist maneuver with Jupiter to rotate its orbital plane far out of the ecliptic, becoming the first spacecraft to go to high ecliptic latitudes (max 80¡) and over the poles of the sun.
The field lines were found to be a spiral form, as had been predicted as a result of the outward solar wind and the rotation of the sun.
hyperphysics.phy-astr.gsu.edu /hbase/solar/ulysses.html   (324 words)

  
 ESA Science & Technology: INFO 13-1998: Ulysses comes full circle, before revisiting the Sun's poles
Arriving in February 1992, Ulysses stole energy from the giant planet in a slingshot manoeuvre and was propelled back towards the Sun in an elongated orbit almost at right angles to the ecliptic plane, where the Earth and other planets circle the Sun.
Ulysses is also a key member of a network of interplanetary spacecraft making observations of enigmatic bursts of gamma rays originating in the far reaches of the Universe.
When Ulysses conducted the first-ever investigation of the high-latitude heliosphere, the Sun was quiet, being near the minimum of solar activity.
sci.esa.int /science-e/www/object/index.cfm?fobjectid=12396   (1113 words)

  
 Spacecraft
Mariner 9, the sister probe to Mariner 8 which failed on launch, became the first craft to orbit Mars in 1971.
The probe did return the first close-up images of the Venusian atmosphere in ultraviolet, revealing previously unseen details in the cloud cover, plus the fact that the entire cloud system circles the planet in four Earth days.
Ulysses was launched by the Space Shuttle Discovery in October 1990.
www.seds.org /nineplanets/nineplanets/spacecraft.html   (3254 words)

  
 Ulysses probe - Wikipedia, the free encyclopedia
The spacecraft, named for the Latin translation of "Odysseus", was launched in October 1990 from the Space Shuttle Discovery (mission STS-41) as a joint venture of NASA and the European Space Agency.
Ulysses approached aphelion in 2003/2004 and made further distant observations of Jupiter.
Particularly "loud" components, such as the preamps for the radio dipole, are mounted outside the structure entirely, and the box acts as a Faraday cage.
en.wikipedia.org /wiki/Ulysses_probe   (1343 words)

  
 Spaceflight Now | Breaking News | Officials seek to extend Ulysses sun probe mission
Ulysses is a joint ESA/NASA mission and NASA's approval is also required for the mission extension.
In the early years of this decade, during the declining phase of the previous solar cycle, Ulysses was en-route to Jupiter, and all measurements were made near the ecliptic (the plane in which the planets orbit) rather than at high solar latitude.
The extension would also allow Ulysses to continue addressing a broad range of astrophysical phenomena, which include locating gamma-ray burst sources, studying the interstellar abundance of rare species like deuterium and 3He, and increasing the precision of cosmic ray isotopic abundance measurements.
spaceflightnow.com /news/n0006/15ulyssesextend/index.html   (620 words)

  
 Ulysses - Wikipedia, the free encyclopedia
Ulysses (poem), a poem by Alfred Lord Tennyson
Ulysses, New York, a town in Tompkins County, New York, USA
Ulysses, Kansas, a small town in the southwest of Kansas, USA
en.wikipedia.org /wiki/Ulysses   (256 words)

  
 ESA Portal - Protecting the Environment - Ulysses returns to the Sun’s south pole and encounters blustery solar ...
Conditions are very different from those Ulysses encountered during its first south polar pass in 1994 when solar activity, which is related to the magnetic behaviour of the Sun, was very low.
At solar minimum, instruments on board Ulysses found that the fast solar wind, emanating from the Sun’s poles, blows at a steady 750 km/s and fills a large fraction of the heliosphere.
Ulysses discoveries, however, have not been confined to the Sun and heliosphere.
www.esa.int /export/esaCP/GGGW28C3KCC_Protecting_0.html   (539 words)

  
 AllRefer.com - space probe (Space Exploration) - Encyclopedia
Unlike an artificial satellite, which is placed in more or less permanent orbit around the earth, a space probe is launched with enough energy to escape the gravitational field of the earth and navigate among the planets.
The Japanese probes Sakigake and Suisei and the European Space Agency's (ESA) probe Giotto both rendezvoused with Halley's comet in 1986, and Giotto also came within 125 mi (200 km) of the nucleus of the comet Grigg-Skjellerup in 1992.
The U.S. probe Ulysses returned data about the poles of the sun in 1994, and the ESA Solar and Heliospheric Observatory (SOHO) was orbited in 1995.
reference.allrefer.com /encyclopedia/S/spacepro.html   (876 words)

  
 The Sun: Man's Friend & Foe - Tour to the Center of the Sun Part 3
They fly to distances beyond the location of the Voyager 2 space probe that is located beyond Pluto's orbit nearly 5914 million kilometers away from the Sun.
To study the solar wind, the European space probe Ulysses was launched.
Ulysses can study the north and south "polar" regions of the Sun.
library.thinkquest.org /15215/Guide/guide_3.html   (291 words)

  
 Vehicules Spatiaux
the first successful probe to flyby Venus in December of 1962, and it returned information which confirmed that Venus is a very hot (800 degrees Fahrenheit, now revised to 900 degrees F.) world with a cloud-covered atmosphere composed primarily of carbon dioxide.
the sister probe to Mariner 3, did reach Mars in 1965 and took the first close-up images of the Martian surface (22 in all) as it flew by the planet.
Flybys would be at 12-18 km/second; data would be recorded onboard the probes during the short encounters and returned to Earth slowly (due to low power, small antenna sizes, and large distances) over the next year or so.
www.neufplanetes.org /vehicules/index.html   (4723 words)

  
 The Space Probe's Lethal Cargo by Karl Grossman
The 1989 space probe, Project Galileo, is to contain 49.25 pounds of plutonium dioxide, most of that plutonium 238, its most radioactive isotope.
So NASA devised a scheme in which the probe would first go to Venus and then be "slingshot" back toward Earth, which it would circle twice, making use of the Earth's gravitational field to increase the vehicle's momentum so it can reach Jupiter.
And for Project Ulysses, whose mission is a north-south orbit of the sun, there is certainly plentiful solar energy.
www.animatedsoftware.com /cassini/kg8801tn.htm   (1016 words)

  
 Aerospaceweb.org | Ask Us - Spacecraft Speed Records
Helios 2 was slightly faster than its twin craft, and this probe still holds the speed record as not only the fastest spacecraft but also the fastest manmade object in history.
Previous holders of this speed record included the European/NASA probe Ulysses, designed to study the Sun, that was launched at 34,450 mph (55,400 km/h) in 1990 and NASA's Pioneer 10 launched to Jupiter at 32,400 mph (52,100 km/h) in 1972.
While this speed is faster than the probe's launch speed, it is still far from the maximum speed attained by both of the Helios vehicles.
www.aerospaceweb.org /question/spacecraft/q0260.shtml   (1077 words)

  
 Spaceflight Now | Breaking News | Ulysses probe predicts weather at Sun's north pole
As Ulysses passed by the south pole of the Sun a few months ago, scientists expected to find that magnetic lines were pointing outward, because observations from Earth show that the magnetic field has already reversed at the Sun's surface.
As it studied the south pole during solar maximum, Ulysses saw energetic particles from many of the past year's solar flares, though they originated at the Sun's equator.
Ulysses, launched in 1990, is a joint venture of NASA and the European Space Agency.
spaceflightnow.com /news/n0109/02ulysses   (782 words)

  
 Probes & Missions
Mars Pathfinder The probe that landed on Mars on July 4, 1997 and it's surface rover Sojourner.
Ulysses A probe sent to look at the north and south poles of the Sun that traveled by way of Jupiter.
Pioneer Venus A mission to Venus that included a flyby and a group of probes that entered the atmosphere (one of which made it to the surface).
www.richastro.org /iw_nasa.htm   (515 words)

  
 DVDExtra: Robots
Probes that trail-blaze on Mars, plunge into Jupiter, and land on Saturn's moon Titan.
The odyssey of the Ulysses probe, gavity assisted by Jupiter, over the poles of the Sun.
Aboard, four robot probes are destroyed - the Cluster mission that should have investigated the solar wind.
www.yorkfilms.com /ccdvdextra/robots.html   (2327 words)

  
 Solar Probe #0
By the design of the mission, Solar Probe will fly directly through regions producing fast and slow wind which fills the solar system, modulates penetrating galactic cosmic rays and, and controls interplanetary space from the Sun to the local interstellar medium beyond the most distant planets.
This is the foundation for the simple and strong rationale for the Solar Probe Mission.
Ulysses collects plasma that originates in the corona.
science.msfc.nasa.gov /ssl/pad/solar/suess/SolarProbe/SolarProbe.htm   (691 words)

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