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00:00:00,000 --> 00:00:05,375
Interstellar space is the
space'between the stars.'

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00:00:05,542 --> 00:00:07,999
But that doesn't mean that'all
space is interstellar.'

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00:00:08,167 --> 00:00:11,999
It's a bit more complicated
than that.

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00:00:12,167 --> 00:00:14,000
At the center of the
solar system

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00:00:15,250 --> 00:00:18,375
is our very own star, the Sun,

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00:00:18,584 --> 00:00:20,083
that has eight planets
orbiting around it, including
our own.'

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00:00:20,292 --> 00:00:24,250
And the Sun is also constantly
spewing out a stream of

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00:00:24,459 --> 00:00:27,834
high-energy particles, which
we call the solar wind

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00:00:27,999 --> 00:00:31,000
This wind forms a giant bubble
around our entire solar system.

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00:00:31,209 --> 00:00:35,334
Other stars have similar
shells around them.'

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00:00:35,542 --> 00:00:36,626
Other stars have similar
shells around them.'

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00:00:36,626 --> 00:00:38,999
Interstellar space begins at
the edge of those star
bubbles,'

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00:00:39,000 --> 00:00:43,751
which are much bigger than
these bubbles.'

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00:00:43,959 --> 00:00:46,999
Interstellar space is hot and
cold at the same time.''

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00:00:47,167 --> 00:00:50,999
The particles are moving
really fast.'

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00:00:51,083 --> 00:00:54,334
Fast-moving particles means
high temperatures.'

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00:00:54,542 --> 00:00:58,751
But get this - you can still
freeze to death.'

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00:00:58,959 --> 00:01:01,999
The particles are so spread
out that they're not very good

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00:01:02,000 --> 00:01:06,751
at transferring heat to your
body.'

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00:01:06,959 --> 00:01:11,125
Inside the solar system, all
of the wind comes from the Sun

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00:01:11,334 --> 00:01:14,792
And the Sun's bubble actually
blocks out the wind from other
stars.

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00:01:14,999 --> 00:01:18,292
But out in interstellar space,
there's wind blowing from many
different stars

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00:01:19,125 --> 00:01:22,584
and it all swirls together.'

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00:01:22,792 --> 00:01:24,459
It's a glorious mix of
particles, energy and magnetic
fields -'

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00:01:24,667 --> 00:01:28,501
totally unlike the kind of
environment we experience on
Earth.'

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00:01:28,709 --> 00:01:32,209
In the 1970s, NASA launched
two space probes that are now'

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00:01:32,417 --> 00:01:37,375
speeding through interstellar
space,

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00:01:37,584 --> 00:01:39,709
beyond the bubble of our solar
system.'

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00:01:39,918 --> 00:01:43,083
After a tour of our neighbor
planets,'

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00:01:43,292 --> 00:01:45,083
Voyager 1 and Voyager 2 are
now the first human-made

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00:01:45,292 --> 00:01:50,292
objects on an interstellar
adventure.'

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00:01:50,501 --> 00:01:52,918
Another out-of-this-world
thing about interstellar space

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00:01:52,999 --> 00:01:56,751
is that each of the Voyagers
is carrying a Golden Record on
its journey,

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00:01:56,959 --> 00:02:01,876
with songs, sounds and
greetings from our home on
planet Earth.'

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00:02:01,999 --> 00:02:06,459
So maybe one day they'll tell
the story of our world to
extraterrestrials.'

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00:02:06,667 --> 00:02:11,792
It's pretty cool that we
humans now have a message in a
bottle

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00:02:11,999 --> 00:02:15,834
all the way out there in
interstellar space.'

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00:02:15,999 --> 00:02:17,999
Thanks for joining us with 5
Things About Interstellar
Space!

39
00:02:18,083 --> 00:02:21,999
And tune in to NASA Science
Live for more about
interstellar space.'