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How Are We Made of Star Stuff? We Asked a NASA Expert

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How are we made of star stuff?

We Asked a NASA Scientist.

Well, the important thing to understand

about this question

is that it&#39;s not an analogy, it&#39;s literally true.

The elements in our bodies,

the elements that make up our bones,

the trees we see outside,

the other planets in the solar system,

other stars in the galaxy.

These were all part of stars that existed

well before our Sun and Earth

and solar system were even formed.

The universe existed

for billions of years before we did.

And all of these elements

that you see

on the periodic table,

you see carbon and oxygen and silicon and iron,

the common elements

throughout the universe,

were all put there

by previous generations of stars

that either

blew off winds

like the Sun blows off a solar wind,

or exploded in supernova explosions

and thrust their elements

throughout the universe.

These are the same things

that we can trace with modern telescopes,

like the Hubble Telescope

and the James Webb Space Telescope,

the Chandra X-ray Observatory.

These are all elements

that we can map out in the universe

with these observatories

and trace back to the same things that form us

and the elemental abundances

that we see in stars now

are the same things that we see

in the Earth&#39;s crust,

we see in asteroids.

And so we know that

these are the same elements

that were once part of these stars.

So the question of,

“How are we made of star stuff?”,

in the words of Carl Sagan,

“The cosmos is within us. We are made of star stuff. We are a way for the universe to know itself.”

We Asked a NASA Scientist.

NASA. A NASA 360 Production.

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YouTube Transcript:How Are We Made of Star Stuff? We Asked a NASA Expert

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YouTube Transcript:
How Are We Made of Star Stuff? We Asked a NASA Expert