Life and Death of a Planetary System


[Music] Life and Death of
a Planetary System 0 to 100,000 years How do you make planets?
First, you need a star. A star is born in a cold cloud that collapses into
a ball of gas… with a disk around it that
looks like a pancake. 100,000 to 1 million years As it eats gas and
dust from the disk, the baby star brightens and
shoots out jets from its poles. 1 million to 10 million years Baby planets grow from small grains
of dust that stick together. They become
bigger as they collide with other
small objects. Childhood for
planets involves a lot of crashing
into other things. 10 million to 1 billion years As teenagers, these
planets don’t sit still. They move around and
interact with one another and kick smaller objects
toward other planets, into the star, or
out of the system. 1 billion to 10 billion years Middle age for planets is like
our solar system today. The planets’ orbits don’t
change much anymore. Our solar system is
4.6 billion years old. 10 billion to 11 billion years Stars like our Sun become red
giants when they are old. A red giant’s core gets smaller
but also very hot… making the star
puff up so much that it can eat the
closest planets to it. 11 billion to 13 billion years The old red giant eventually
burns all of the fuel in its core and blows
off its outer gas layers leaving a dense
“white dwarf.” Our Sun will reach this death about 8 billion
years from now. Only the most massive stars
will instead explode, their violent deaths triggering
the births of new stars. Destruction sparks the
creation of new worlds. Beginning the cycle again. Learn more about the lives of
stars and planets at: exoplanets.nasa.gov/
livesofplanets Visualization Credits: “Pillars
of Creation” image from NASA, ESA/Hubble and the
Hubble Heritage Team Star with jets, asteroid
and orbit visualizations by NASA’s Goddard
Scientific Visualization Studio Planet with ring
formation visualization by ESA/ Hubble (M. Kornmesser
& L. L. Christensen) Young planet, red
giant and white dwarf visualizations by
NASA/JPL-Caltech/D. Berry [LOGO: NASA Jet
Propulsion Laboratory California Institute
of Technology]

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