NASA Probe Enters Unexplored 'Cosmic Purgatory' at Solar System's Edge - Polidicks

[release][t]http://i.space.com/images/i/13682/original/nasa-voyager-1-solar-system-edge.jpg?1323114738[/t] After more than 30 years of traveling through the cosmos, a far-flung NASA spacecraft has entered an uncharted region between our solar system and interstellar space, scientists announced today (Dec. 5). NASA's Voyager 1 spacecraft is about 11 billion miles (18 billion kilometers) away from the sun, and data collected from the steadfast probe indicate that it has crossed into new territory that scientists are calling the "stagnation region." In this expanse, the flow of solar wind, which consists of charged particles that stream from the sun, has calmed down, our solar system's magnetic field appears to be compressed, and high-energy particles from inside the solar system seem to be leaking out into interstellar space. This transition zone is thought to be like a "cosmic purgatory," the astronomers said. "Voyager tells us now that we're in a stagnation region in the outermost layer of the bubble around our solar system," Ed Stone, Voyager project scientist at Caltech in Pasadena, Calif., said in a statement. "Voyager is showing that what is outside is pushing back. We shouldn't have long to wait to find out what the space between stars is really like." The latest results from the Voyager mission were presented today at the 2011 American Geophysical Union's fall meeting in San Francisco. [B]Journey to the edge of the solar system [/B] The Voyager 1 probe is currently the farthest manmade object from Earth, but has not yet reached interstellar space, Stone said. Data received from the probe indicate that it is still within the so-called heliosphere, which is a large bubble of solar plasma and solar magnetic fields that the sun blows around itself. At the perimeter of the heliosphere is the heliosheath, a turbulent region at the outer edge of the solar system. At the edge of the heliosheath is the heliopause, a demarcation line that bounds our solar system from interstellar space. Voyager 1 covers about 330 million miles (531 million km) every year, and scientists predict that it could cross the heliopause soon — within a few months to a few years. But the precise moment when this will happen is difficult to pin down. "I can almost assure you that we will be confused when it first happens," Stone said during a news conference today. "This will undoubtedly not be simple. Nature tends to be much more creative than our own minds." Part of the uncertainty comes from the fact that there are still many unknowns about the characteristics of these regions at the edge of the solar system. For instance, the thicknesses of the stagnation region and the heliopause remain a mystery. "Newton tells us the spacecraft will reach interstellar space," Stone said. "The question is, will we still be transmitting when that happens? No spacecraft has ever been there before. We continue to find our models need to be improved as we learn more about the complex interaction between solar wind and interstellar wind. The transition may not be instantaneous. There may be a turbulent interface, [and it] may take us months to get through a rather messy interface between these two winds." [t]http://i.space.com/images/i/10186/i02/voyager1-edge-universe.jpg?1307975302[/t] [B]Breaking new ground [/B] In April 2010, scientists reported that the outward speed of solar wind had diminished to zero, which indicated the start of the new region. To follow up these observations, mission managers rolled Voyager 1 four times this spring and summer to investigate whether the solar wind was blowing strongly in another direction. What the researchers found was that Voyager 1 is journeying through space in a region similar to the doldrums in Earth's seas, where there is very little wind. Over the past year, instruments onboard Voyager 1 also found that the intensity of the solar magnetic field in the stagnation region had doubled. This increase demonstrates that inward pressure from interstellar space is causing it to compress. "Once the wind slows down, the [magnetic] field lines get compressed and field intensity goes up," Stone explained. "That's precisely what we've seen now in the last year. Today, it's about twice what it had been for the previous four years." As it journeys toward interstellar space, Voyager 1 has been measuring energetic particles that originate from inside and outside our solar system. Until mid-2010, the intensity of particles originating from inside the solar system had been holding steady, the scientists said. During the past year, the abundance of these energetic particles has been in decline, reaching a point now that is half what it was throughout the previous five years. This leads the researchers to think the high-energy particles are seeping into interstellar space. While this is going on, Voyager is also detecting a sharp increase in the intensity of cosmic rays from elsewhere in the galaxy, penetrating into the solar system from outside. This is yet another sign that the spacecraft is approaching the boundary of interstellar space. "We've been using the flow of energetic particles at Voyager 1 as a kind of wind sock to estimate the solar wind velocity," Rob Decker, a co-investigator on Voyager's Low-Energy Charged Particle Instrument at the Johns Hopkins University Applied Physics Laboratory in Laurel, Md., said in a statement. "We've found that the wind speeds are low in this region and gust erratically. For the first time, the wind even blows back at us. We are evidently traveling in completely new territory. Scientists had suggested previously that there might be a stagnation layer, but we weren't sure it existed until now." [t]http://i.space.com/images/i/10243/i02/voyager-nasa-solar-system-heliosheath.jpg?1308170383[/t] [B]An ongoing voyage [/B] NASA launched Voyager 1 along with its sister Voyager 2 in 1977 to study the outer planets of the solar system. Voyager 2 is trailing its twin counterpart, and is currently 9 billion miles (15 billion km) away from the sun. The instruments aboard the Voyagers are powered by radioisotope thermoelectric generators, which convert the heat from plutonium's radioactive decay into electricity. The spacecraft have enough fuel to keep the instruments running until at least 2020, Stone said. Though no one knows exactly what they will find, scientists are hoping that the Voyager probes continue to reveal exciting new discoveries about the solar system and beyond as they continue their cosmic cruise. Until then, scientists are eagerly awaiting the next breakthrough. "For me, it's been constant entertainment," said Eugene Parker, a professor emeritus in the department of physics at the University of Chicago. "I hold my breath as to what's going to happen next." And for a mission that has been going strong for 34 years, astronomers have come to expect the unexpected. "I think the entire science team — none of us could have imagined the wealth of discovery that continues today," Stone said. "No doubt there's still a lot of discovery left, and that's what science is all about." [/release] [URL="http://www.space.com/13824-nasa-voyager-spacecraft-interstellar-space.html"]Source[/URL]

I haven't heard anything about Voyager 1 for a long time, good to know that after 30 years it's still useful.

My grandad used to keep up to date with all of Voyager's news. He'd tell me whenever something happened. He would have loved to see this. I hope they get a lot of valuable information from this.

Oh man. It still gets me when you put it into perspective how the sun is hurtling through space

This makes me feel happy and tingly.

Whoever worked on this project must be the proudest damned person on the face of the planet, and they have every right to be. They've built a device that has not only traveled to the edge of our entire solar system, but is still sending back data, still has power, and is of use to us as a species. In one word? [B]Amazing[/B]

It truly is a legendary probe.

The picture looks weird with snow flying over it.

[QUOTE=ewitwins;33589112]Whoever worked on this project must be the proudest damned person on the face of the planet, and they have every right to be. They've built a device that has not only traveled to the edge of our entire solar system, but is still sending back data, still has power, and is of use to us as a species. In one word? [B]Amazing[/B][/QUOTE] The Voyagers are and will be the scientific legacy of mankind. Nothing will ever surpass them until the day we can travel out and see them again.

[QUOTE=MIPS;33589759]The Voyagers are and will be the scientific legacy of mankind. Nothing will ever surpass them until the day we can travel out and see them again.[/QUOTE] and if we send out faster, longer lasting probes?

I hope one day, thousands of years in the future, we can recover the probes and give them a nice welcome home party on earth.

[I]cool[/I] [editline]6th December 2011[/editline] [QUOTE=ewitwins;33589112]Whoever worked on this project must be the proudest damned person on the face of the planet, and they have every right to be. They've built a device that has not only traveled to the edge of our entire solar system, but is still sending back data, still has power, and is of use to us as a species. In one word? [B]Amazing[/B][/QUOTE] This

I felt all tingly inside when I read this. It gives me hope that within my lifetime, we'll be able to go and see those legendary probes for ourselves.

This is awesome, but hard to take seriously with all the snow.

I still wonder what will happen if some other race finds it. If I recall Voyager had a picture of a man and a woman on it, along with an inscription for just such an occassion.

[QUOTE=Zero-Point;33590643]I still wonder what will happen if some other race finds it. If I recall Voyager had a picture of a man and a woman on it, along with an inscription for just such an occassion.[/QUOTE] That's the [url=http://en.wikipedia.org/wiki/Pioneer_plaque]Pioneer Plaque[/url], the [url=http://en.wikipedia.org/wiki/Voyager_Golden_Disc]Voyager Golden Record[/url] contains [url=http://en.wikipedia.org/wiki/Contents_of_the_Voyager_Golden_Record]audio from a bunch of languages, photos, and music[/url]

[QUOTE=Zero-Point;33590643]I still wonder what will happen if some other race finds it. If I recall Voyager had a picture of a man and a woman on it, along with an inscription for just such an occassion.[/QUOTE] Recorded greetings in dozens of languages, common Earth sounds like rain, and music were also put onto Voyager. Here's the lists of things put onto the Voyager [url]http://voyager.jpl.nasa.gov/spacecraft/scenes.html[/url] NINJA'D

[QUOTE=Dacheet;33590767]That's the [url=http://en.wikipedia.org/wiki/Pioneer_plaque]Pioneer Plaque[/url], the [url=http://en.wikipedia.org/wiki/Voyager_Golden_Disc]Voyager Golden Record[/url] contains [url=http://en.wikipedia.org/wiki/Contents_of_the_Voyager_Golden_Record]audio from a bunch of languages, photos, and music[/url][/QUOTE] Ah, my mistake. It's been forever and an age since I've read about that.

[QUOTE=viperfan7;33589993]and if we send out faster, longer lasting probes?[/QUOTE] They wont have the prestige of the voyager probes. Just like we will never forget the rovers rolling around mars (well one anyway), even curiosity wont live up to spirit and opportunity.

[QUOTE=Cmx;33590909]They wont have the prestige of the voyager probes. Just like we will never forget the rovers rolling around mars (well one anyway), even curiosity wont live up to spirit and opportunity.[/QUOTE] Yet it seems we've already forgotten about Sojourner. :C

The term "Cosmic Purgatory" sends shivers down my spine...

Reading about the Voyager probes always puts me in a good mood :3

[QUOTE=fskman;33590038]I hope one day, thousands of years in the future, we can recover the probes and give them a nice welcome home party on earth.[/QUOTE] It's all fun and games until it demands to be merged with it's creator.

I would like to see this probe discover something really significant in my life time, its already a legendary probe and I'm glad to be alive while we are still in contact with it.

[QUOTE=Mingebox;33592218]It's all fun and games until it demands to be merged with it's creator.[/QUOTE] Damn I was going to make that reference.

And suddenly it bumps into a Horrorterror.

Soon we will all see forever. Also [quote]"I hold my breath as to what's going to happen next." And for a mission that has been going strong for 34 years, astronomers have come to expect the unexpected.[/quote] Hows ya lungs?

40 year old tech and still giving out good intel. Gotta admire it's persistence. But how long will it be before it goes beyond our sensors or finally burns out? Only time will tell...

I think the voyager missions are some of the most important and successful scientific missions ever done. And it amazes me that after 30 years in the harsh and cold vacuum, these machines are still able to talk with us. Let's hope we can enjoy their discoveries for a few more years.

[QUOTE=rosthouse;33594245]I think the voyager missions are some of the most important and successful scientific missions ever done. And it amazes me that after 30 years in the harsh and cold vacuum, these machines are still able to talk with us. Let's hope we can enjoy their discoveries for a few more years.[/QUOTE] Up until around 2025, if everything goes nicely, and power supply degradation remains as anticipated. But of course, by that time most of the systems will either be defective or shut off due to age and power constraints.