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this is a book Voyager mission control

2
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area this is where we talk to our

3
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tonight we're going to be getting the

4
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data back from a magnetometer roll

5
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calibration maneuver and that maneuver

6
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actually happened on the Voyager 1

7
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spacecraft more than 16 hours ago but

8
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the data is finally making it back to

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the earth what we're doing is a roll

10
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about this high gain antenna and so if

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if the high gain antenna here is pointed

12
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out toward the earth we're gonna be

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rolling the spacecraft along that I gain

14
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antenna that roll is done so that we can

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calibrate the instrument so that when we

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take data we know what magnetic field

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belongs to the Sun and what what

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component belongs to the actual

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spacecraft Voyager 1 is now 120 times as

20
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far from the Sun as the earth is that

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means it's 11 billion miles out and

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Voyager 2 is 9 billion miles out there

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very near the edge of the bubble the Sun

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creates around itself called the

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heliosphere we're getting very close to

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the boundary we don't know how close

27
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because no spacecraft has ever been

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there before but it could be another few

29
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months it could be another few years but

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it's probably not much longer than that

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we travel a billion miles every three

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years you can't see the bubble the Sun

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creates around itself because it's

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invisible but we can see an analogue of

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it in a sink if we turn the water on

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very fast and look at the bottom of the

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sink we see that near where the water

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hits the bottom the sink it's flowing

39
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very fast radially outward in all

40
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directions and getting thinner until it

41
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slows down in this thick region and

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turns around and flows down the drain

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the two Voyager spacecraft are both in

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this thick region in our heliosphere

45
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where the wind is slowed down and is

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training to go down the tail of the

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heliosphere and eventually within the

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hopefully not too many more years

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Voyager 1 will leave this thick region

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and enter interstellar space it's really

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remarkable we have a 20 watt transmitter

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on the spacecraft transmitting over 11

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billion miles away and so it comes in

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very slowly but every bit left that

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spacecraft over 16 hours