Voyager I and II

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saturno2
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Re: Voyager I and II

Post by saturno2 » Sun Sep 03, 2017 2:42 am

APOD Robot wrote: ( 2017 Sept 02 )
" Now humanity´s first ambassador to the Milky Way,
Voyager 1 is over 19 light-hours away, beyond the
heliosphere in interstellar space. Celebrate the
Voyagers´ 40 year journed toward the stars with
NASA on September 5. "
Congratulations !!

declareself
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Re: Voyager I and II

Post by declareself » Mon Oct 09, 2017 7:18 am

These missions caused us trillions of dollars

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neufer
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Re: Voyager I and II

Post by neufer » Mon Oct 09, 2017 1:09 pm

declareself wrote:
These missions caused us trillions of dollars
  • Unnecessary wars cost trillions of dollars.
    Spacecraft mission costs are more like a billion dollars.
https://www.reuters.com/article/us-iraq-war-anniversary/iraq-war-costs-u-s-more-than-2-trillion-study-idUSBRE92D0PG20130314 wrote:
NEW YORK (Reuters) - <<The U.S. war in Iraq has cost $1.7 trillion with an additional $490 billion in benefits owed to war veterans, expenses that could grow to more than $6 trillion over the next four decades counting interest, a study released on Thursday said. >>
https://voyager.jpl.nasa.gov/mission/did-you-know/ wrote:
<<The total cost of the Voyager mission from May 1972 through the Neptune encounter (including launch vehicles, radioactive power source (RTGs), and DSN tracking support) is 865 million dollars. At first, this may sound very expensive, but the fantastic returns are a bargain when we place the costs in the proper perspective. It is important to realize that:
  • on a per-capita basis, this is only 8 cents per U.S. resident per year, or roughly half the cost of one candy bar each year since project inception. the entire cost of Voyager is a fraction of the daily interest on the U.S. national debt.

    A total of 11,000 workyears was devoted to the Voyager project through the Neptune encounter. This is equivalent to one-third the amount of effort estimated to complete the great pyramid at Giza to King Cheops.
A total of five trillion bits of scientific data had been returned to Earth by both Voyager spacecraft at the completion of the Neptune encounter. This represents enough bits to fill more than seven thousand music CDs.

The sensitivity of our deep-space tracking antennas located around the world is truly amazing. The antennas must capture Voyager information from a signal so weak that the power striking the antenna is only 10-16 watts. A modern-day electronic digital watch operates at a power level 20 billion times greater than this feeble level.>>
Art Neuendorffer

saturno2
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Re: Voyager I and II

Post by saturno2 » Sat Oct 14, 2017 3:04 pm

declareself wrote:
These missions caused us trillions of dollars
Suppose we eliminate the purchase of weapons
Suppose we eliminate all the world´s army
Suppose we eliminate all kinds of wars
That would give an enormons quantity of
resources to invest in food and medicines
for millions of human beings. Indeed!

BDanielMayfield
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Re: Voyager I and II

Post by BDanielMayfield » Wed Oct 18, 2017 1:47 pm

saturno2 wrote:
declareself wrote:
These missions caused us trillions of dollars
Suppose we eliminate the purchase of weapons
Suppose we eliminate all the world´s army
Suppose we eliminate all kinds of wars
That would give an enormons quantity of
resources to invest in food and medicines
for millions of human beings. Indeed!
Beautiful thoughts saturno2.

I wonder if declareself’s incomplete comment was really a complaint about these missions’ costs. If so, it was over stated by a thousandfold or so, but he didn’t say “cost”, he said “caused”. Perhaps this is what he meant:

“These missions caused us trillions of dollars” of benefits in knowledge gained.

Bruce
"Happy are the peaceable ... "

BDanielMayfield
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Re: Voyager I and II

Post by BDanielMayfield » Thu Oct 19, 2017 4:25 pm

I do declare, it be time fo declareself ta declare what the heck hisself wuz ameanin ta say y’all :!:
"Happy are the peaceable ... "

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bystander
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Voyager 1 Fires Up Thrusters After 37 Years

Post by bystander » Sat Dec 02, 2017 3:21 pm

Voyager 1 Fires Up Thrusters After 37 Years
NASA | JPL-Caltech | Voyager | 2017 Dec 01
[img3="The Voyager team is able to use a set of four backup thrusters, dormant since 1980. They are located on the back side of the spacecraft in this orientation. Credit: NASA/JPL-Caltech"]https://www.jpl.nasa.gov/images/voyager ... 839-16.jpg[/img3][hr][/hr]
If you tried to start a car that's been sitting in a garage for decades, you might not expect the engine to respond. But a set of thrusters aboard the Voyager 1 spacecraft successfully fired up Wednesday after 37 years without use.

Voyager 1, NASA's farthest and fastest spacecraft, is the only human-made object in interstellar space, the environment between the stars. The spacecraft, which has been flying for 40 years, relies on small devices called thrusters to orient itself so it can communicate with Earth. These thrusters fire in tiny pulses, or "puffs," lasting mere milliseconds, to subtly rotate the spacecraft so that its antenna points at our planet. Now, the Voyager team is able to use a set of four backup thrusters, dormant since 1980. ...

Since 2014, engineers have noticed that the thrusters Voyager 1 has been using to orient the spacecraft, called "attitude control thrusters," have been degrading. Over time, the thrusters require more puffs to give off the same amount of energy. At 13 billion miles from Earth, there's no mechanic shop nearby to get a tune-up.

The Voyager team assembled a group of propulsion experts at NASA's Jet Propulsion Laboratory, Pasadena, California, to study the problem. Chris Jones, Robert Shotwell, Carl Guernsey and Todd Barber analyzed options and predicted how the spacecraft would respond in different scenarios. They agreed on an unusual solution: Try giving the job of orientation to a set of thrusters that had been asleep for 37 years. ...
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

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neufer
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Re: Voyager 1 Fires Up Thrusters After 37 Years

Post by neufer » Sat Dec 02, 2017 3:51 pm

Click to play embedded YouTube video.
bystander wrote:
Voyager 1 Fires Up Thrusters After 37 Years
NASA | JPL-Caltech | Voyager | 2017 Dec 01

If you tried to start a car that's been sitting in a garage for decades, you might not expect the engine to respond. But a set of thrusters aboard the Voyager 1 spacecraft successfully fired up Wednesday after 37 years without use.
Art Neuendorffer