The Farthest _ excellent doco on the Voyager Missions

[Pie eyed]

Just watched the two episode doco. Available on ABC Iview.

One of mans greatest achievements.

At the end of the "Grand Tour" the mission was darkened by the Challenger disaster and the program featured a snippet of Ronald Reagan's response to the disaster.
His words bring into stark contrast how far backwards the US's and in many ways our Leaders deteriorated since the oft maligned "B" Grade actor was the leader of the free world.
No matter his politics he could actually speak like a leader.
So long since this country had a real leader who could speak.

Keating the last I think.

 

[darth_timon]

The Voyager probes are wonderful pieces of engineering - the fact they are still working and still transmitting even now is incredible. Challenger... I have no words for how horrible that was.

 

[Snake_Baker]

The shinboner of the space program!

 

[Rotayjay]

To think that when we, our buildings and monuments have gone to dust, those two probes will still be flying around the galaxy. Probes that have left the solar system, like the Voyagers and Pioneers, will be the last traces of us. Those traces will float in the deep, dark waters of space, probably never to be found - unread messages in a bottle.

 

[HerveyBayTiger]

To think that when we, our buildings and monuments have gone to dust, those two probes will still be flying around the galaxy. Probes that have left the solar system, like the Voyagers and Pioneers, will be the last traces of us. Those traces will float in the deep, dark waters of space, probably never to be found - unread messages in a bottle.

If someones out there how do you know they will never be found.

I now its a needle in a haystack but its still a needle.

 

[Rotayjay]

If someones out there how do you know they will never be found.

I now its a needle in a haystack but its still a needle.

If aliens find them and they're advanced, I'm sure they can figure out how to play a record. It would be a weird experience for them to see a showcase of a faraway, probably long-lost civilisation. But would they have any way of knowing how old the probe is?

 

[Werewolf]

Live mission status of both probes: Voyager Mission Status and Voyager 1 tracker & Voyager 2 tracker

Interesting how (currently) the distance from Earth is decreasing but the distance from the Sun is increasing!

 

[Pie eyed]

Just watched the two episode doco. Available on ABC Iview.

One of mans greatest achievements.

At the end of the "Grand Tour" the mission was darkened by the Challenger disaster and the program featured a snippet of Ronald Reagan's response to the disaster.
His words bring into stark contrast how far backwards the US's and in many ways our Leaders deteriorated since the oft maligned "B" Grade actor was the leader of the free world.
No matter his politics he could actually speak like a leader.
So long since this country had a real leader who could speak.

Keating the last I think.

I have just bought this doco on DVD.

100% on Rotten Tomatoes, 8.2/10 on IMDB, 87% on metacritic, 91% on Google

 

[Werewolf]

Live mission status of both probes: Voyager Mission Status and Voyager 1 tracker & Voyager 2 tracker

Interesting how (currently) the distance from Earth is decreasing but the distance from the Sun is increasing!

Update: Both Voyagers are still moving away from the Sun, but Voyager 1 is now moving away from Earth while Voyager 2 isn't.

 

[Thegibbsgamble]

In this country our essential services all have the same problem

Lack of resources


When the ambulance is late and your grandmother dies because there was a shortage of ambulances.

Remember the space program

 

[Werewolf]

In this country our essential services all have the same problem

Lack of resources


When the ambulance is late and your grandmother dies because there was a shortage of ambulances.

Remember the space program

The NASA budget is far less than the US defence budget, and a tiny fraction of the overall budget. The US has funded all kinds of dodgy groups in other countries. Politicians keep giving themselves pay rises. You could find a lot of ways to save money before cutting NASA

 

[Thegibbsgamble]

The NASA budget is far less than the US defence budget, and a tiny fraction of the overall budget. The US has funded all kinds of dodgy groups in other countries. Politicians keep giving themselves pay rises. You could find a lot of ways to save money before cutting NASA

You're an apoligist to an industry that Is all ego

However you made a mistake you didn't realise

Those wars that America creates is to control the recources NASA needs.

Certain rare earth's used in the probes are garnered by war in Africa.

If it wasn't for the genocide in the congo then those rare earth's would be controlled by China.

 

[darth_timon]

You're an apoligist to an industry that Is all ego

However you made a mistake you didn't realise

Those wars that America creates is to control the recources NASA needs.

Certain rare earth's used in the probes are garnered by war in Africa.

If it wasn't for the genocide in the congo then those rare earth's would be controlled by China.

The wars you speak of are hardly about supporting NASA. If all that money and time and effort (to say nothing of the human cost) was about genuinely supporting NASA, simply spending that money on NASA itself (to say nothing of other endeavours) would have more impact.


Sent from my iPhone using Tapatalk

 

[Werewolf]

Update: Both Voyagers are still moving away from the Sun, but Voyager 1 is now moving away from Earth while Voyager 2 isn't.

Now both Voyagers are moving away from both the Earth & Sun!

 

[Snake_Baker]

Voyager 2 Illuminates Boundary of Interstellar Space


This artist's concept shows one of NASA's Voyager spacecraft entering interstellar space, or the space between stars. This region is dominated by plasma ejected by the death of giant stars millions of years ago. Hotter, sparser plasma fills the environment inside our solar bubble.
Credits: NASA/JPL-Caltech


One year ago, on Nov. 5, 2018, NASA's Voyager 2 became only the second spacecraft in history to leave the heliosphere — the protective bubble of particles and magnetic fields created by our Sun. At a distance of about 11 billion miles (18 billion kilometers) from Earth — well beyond the orbit of Pluto — Voyager 2 had entered interstellar space, or the region between stars. Today, five new research papers in the journal Nature Astronomy describe what scientists observed during and since Voyager 2's historic crossing.

Each paper details the findings from one of Voyager 2's five operating science instruments: a magnetic field sensor, two instruments to detect energetic particles in different energy ranges and two instruments for studying plasma (a gas composed of charged particles). Taken together, the findings help paint a picture of this cosmic shoreline, where the environment created by our Sun ends and the vast ocean of interstellar space begins.

The Sun's heliosphere is like a ship sailing through interstellar space. Both the heliosphere and interstellar space are filled with plasma, a gas that has had some of its atoms stripped of their electrons. The plasma inside the heliosphere is hot and sparse, while the plasma in interstellar space is colder and denser. The space between stars also contains cosmic rays, or particles accelerated by exploding stars. Voyager 1 discovered that the heliosphere protects Earth and the other planets from more than 70% of that radiation.

When Voyager 2 exited the heliosphere last year, scientists announced that its two energetic particle detectors noticed dramatic changes: The rate of heliospheric particles detected by the instruments plummeted, while the rate of cosmic rays (which typically have higher energies than the heliospheric particles) increased dramatically and remained high. The changes confirmed that the probe had entered a new region of space.


This illustration shows the position of NASA’s Voyager 1 and Voyager 2 probes, outside of the heliosphere, a protective bubble created by the Sun that extends well past the orbit of Pluto.
Credits: NASA/JPL-Caltech


Before Voyager 1 reached the edge of the heliosphere in 2012, scientists didn't know exactly how far this boundary was from the Sun. The two probes exited the heliosphere at different locations and also at different times in the constantly repeating, approximately 11-year solar cycle, over the course of which the Sun goes through a period of high and low activity. Scientists expected that the edge of the heliosphere, called the heliopause, can move as the Sun's activity changes, sort of like a lung expanding and contracting with breath. This was consistent with the fact that the two probes encountered the heliopause at different distances from the Sun.

The new papers now confirm that Voyager 2 is not yet in undisturbed interstellar space: Like its twin, Voyager 1, Voyager 2 appears to be in a perturbed transitional region just beyond the heliosphere.

"The Voyager probes are showing us how our Sun interacts with the stuff that fills most of the space between stars in the Milky Way galaxy," said Ed Stone, project scientist for Voyager and a professor of physics at Caltech. "Without this new data from Voyager 2, we wouldn't know if what we were seeing with Voyager 1 was characteristic of the entire heliosphere or specific just to the location and time when it crossed."

Pushing Through Plasma

The two Voyager spacecraft have now confirmed that the plasma in local interstellar space is significantly denser than the plasma inside the heliosphere, as scientists expected. Voyager 2 has now also measured the temperature of the plasma in nearby interstellar space and confirmed it is colder than the plasma inside the heliosphere.

In 2012, Voyager 1 observed a slightly higher-than-expected plasma density just outside the heliosphere, indicating that the plasma is being somewhat compressed. Voyager 2 observed that the plasma outside the heliosphere is slightly warmer than expected, which could also indicate it is being compressed. (The plasma outside is still colder than the plasma inside.) Voyager 2 also observed a slight increase in plasma density just before it exited the heliosphere, indicating that the plasma is compressed around the inside edge of the bubble. But scientists don't yet fully understand what is causing the compression on either side.

Leaking Particles

If the heliosphere is like a ship sailing through interstellar space, it appears the hull is somewhat leaky. One of Voyager's particle instruments showed that a trickle of particles from inside the heliosphere is slipping through the boundary and into interstellar space. Voyager 1 exited close to the very "front" of the heliosphere, relative to the bubble's movement through space. Voyager 2, on the other hand, is located closer to the flank, and this region appears to be more porous than the region where Voyager 1 is located.

Magnetic Field Mystery

An observation by Voyager 2's magnetic field instrument confirms a surprising result from Voyager 1: The magnetic field in the region just beyond the heliopause is parallel to the magnetic field inside the heliosphere. With Voyager 1, scientists had only one sample of these magnetic fields and couldn't say for sure whether the apparent alignment was characteristic of the entire exterior region or just a coincidence. Voyager 2's magnetometer observations confirm the Voyager 1 finding and indicate that the two fields align, according to Stone.

The Voyager probes launched in 1978, and both flew by Jupiter and Saturn. Voyager 2 changed course at Saturn in order to fly by Uranus and Neptune, performing the only close flybys of those planets in history. The Voyager probes completed their Grand Tour of the planets and began their Interstellar Mission to reach the heliopause in 1989. Voyager 1, the faster of the two probes, is currently over 13.6 billion miles (22 billion kilometers) from the Sun, while Voyager 2 is 11.3 billion miles (18.2 billion kilometers) from the Sun. It takes light about 16.5 hours to travel from Voyager 2 to Earth. By comparison, light traveling from the Sun takes about eight minutes to reach Earth.
More information about Voyager is available at the following site:

https://voyager.jpl.nasa.gov/
​

Calla Cofield
Jet Propulsion Laboratory, Pasadena, Calif.
626-808-2469
calla.e.cofield@jpl.nasa.gov
2019-218