Archiv: Voyager 1 (spacecraft)

02.01.2020 - 17:18 [ ]

„Magnetische Wand“ im interstellaren Raum


„Voyager 2“ hat die Grenze der Heliosphäre in nur einem Tag passiert, was einen scharfen Übergang zum lokalen interstellaren Medium bedeutet. „Die alte, historische Vorstellung, dass der Sonnenwind sich einfach allmählich reduziert, je weiter man in den interstellaren Raum vordringt, trifft nicht zu“, erläuterte „Voyager“-Forscher Don Gurnett von der Universität von Iowa, Ko-Autor einer der Analysen. „Wir haben mit ‚Voyager 2‘ und vorher mit ‚Voyager 1 gezeigt, dass es dort draußen eine ausgeprägte Grenze gibt.“

04.11.2019 - 19:38 [ ]

Voyager 2 reveals the dynamic, complex nature of the solar system’s edge

Despite encountering the heliopause at different times and locations — the two spacecraft are farther from each other than each are from the sun — some things looked similar. The magnetic field looked pretty much the same on the inside and the outside of the boundary: Somehow, the sun’s magnetic field lines up nearly perfectly with the local galactic field, contrary to expectations. “We could dismiss that as coincidence in one case, but we can’t do that twice,” study coauthor Leonard Burlaga, of NASA’s Goddard Space Flight Center in Greenbelt, Md., said in the news conference.

04.11.2019 - 19:30 [ Nature ]

Energetic charged particle measurements from Voyager 2 at the heliopause and beyond

Here, we report measurements of energetic (>28 keV) charged particles on V2 from the interface region between the heliosheath, dominated by heated solar wind plasma, and the VLISM, expected to contain cold non-solar plasma and the Galactic magnetic field. The number of particles of solar origin began a gradual decrease on 7 August 2018 (118.2 au), while those of Galactic origin (Galactic cosmic rays) increased ~20% in number over a period of a few weeks. An abrupt change occurred on 5 November when V2 was located at 119 au, with a decrease in the number of particles at energies of >28 keV and a corresponding increase in the number of Galactic cosmic rays of energy E > 213 MeV. T

04.11.2019 - 19:19 [ ]

Nasa’s Voyager 2 sends back its first signal from interstellar space

The shape depends, in a complex way, on the relative strengths of the magnetic fields inside and outside of the heliosphere, and the latest measurements are suggestive of a more spherical form.

04.11.2019 - 18:51 [ ORF ]

„Magnetische Wand“ im interstellaren Raum

Nach Jahrzehnten haben sie nun die Grenze der Heliosphäre passiert und sind damit auf dem Weg zu den Sternen.

01.11.2019 - 06:23 [ National Aeronautics and Space Administration ]

Pressure Runs High at Edge of Solar System


The scientists noted that the change in galactic cosmic rays wasn’t exactly identical at both spacecraft. At Voyager 2 inside the heliosheath, the number of cosmic rays decreased in all directions around the spacecraft. But at Voyager 1, outside the solar system, only the galactic cosmic rays that were traveling perpendicular to the magnetic field in the region decreased.

01.11.2019 - 06:17 [ ]

Voyager Mission Reveals Unexpected Pressure at The Edge of The Solar System


There was one other surprise to come. The wave’s passage lined up with an apparent drop in the intensity of high speed particles called cosmic rays. The fact each of the probes experienced this same thing in two different ways gives astrophysicists yet another mystery to solve.

„Trying to understand why the change in the cosmic rays is different inside and outside of the heliosheath remains an open question,“ says Rankin.

01.11.2019 - 06:03 [ ]

What Inflates the Solar Bubble? Voyagers Count What’s Missing


We’re all living in a bubble.

In fact, the Sun and the entire solar system exist in a bubble that separates us from interstellar space. But what keeps that bubble inflated? A recent paper found that scientists can account for only 82% of the pressure that steadies the solar bubble, or heliosphere, against pressure from galactic headwinds. The source of 18% of the pressure is still unknown.

20.11.2018 - 13:08 [ National Aeronautics and Space Administration ]

Excitement Increases as Voyager 2 sees a decrease in Heliospheric Particles

(14.11.2018) In the following graph of the Low Energy Telescope data, right around the beginning of November, you’ll notice a pretty dramatic change: All of a sudden, the Voyager 2 counting rate of low-energy particles dropped, although it hasn’t yet dropped to nearly zero as it did when Voyager 1 entered interstellar space. Scientists will keep their eye on these graphs …

20.11.2018 - 13:05 [ NASA Sun & Space ‏/ Twitter ]

Excitement goes up ? as @NASAVoyager 2’s count of heliospheric particles goes down These low-energy particles originate within the Sun’s bubble of magnetic influence — the heliosphere — and their count should drop to near-zero in interstellar space:


08.10.2018 - 21:05 [ ]

NASA’s Voyager 2 probe detects increase in cosmic rays as it approaches the heliosphere

Cosmic rays are fast-moving particles that originate outside the solar system. Some of these cosmic rays are blocked by the heliosphere, so mission planners expect that Voyager 2 will measure an increase in the rate of cosmic rays as it approaches and crosses the boundary of the heliosphere.

08.10.2018 - 21:01 [ ]

NASA’s Voyager 2 Probe Is About To Slip Beyond The Boundaries Of Our Solar System And Into Interstellar Space

Voyager 2 began it’s journey away from Earth back in 1977 and is roughly 11 billion miles from home. In 2007 it entered the outermost layer of the heliosphere, and now based on data recorded by the probe’s Cosmic Ray Subsystem instrument, NASA scientists say there’s a good chance that it is about to reach the boundary (known as the heliopause) and join Voyager 1 in the history books as the second human-made object to go interstellar. Back in August, the cosmic rays hitting the probe increased by five percent.