The biggest planet in the Solar System.
And the smallest star
in the known Universe.
Today they're on a collision course.
And Earth might not survive this.
Meet the star with a catchy name,
EBLM J0555-57Ab.
Its gravity is 300 times that of Earth's.
And it's about the size of our Saturn.
EBLM J0555-57Ab is a red dwarf
and the smallest star
we've ever discovered.
Usually, it resides
600 light-years away from us,
in its own double-star system.
But not today.
Today, it broke the cosmic speed limit
and rushed toward our Solar System
to meet with the biggest gas giant in it.
Jupiter.
Let me just tell you,
Jupiter is huge.
It's about 11 times larger than Earth.
It's even bigger
than the red dwarf star coming its way.
But because it's mostly made of hydrogen,
it's not massive enough to be a star.
To start converting all its hydrogen
into helium and turn into a red dwarf,
Jupiter would need to be at least
80 times more massive than it is today.
So what would happen if these
two gas giants collided?
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Champions will clash in Raid,
but these celestial titans are ready to collide now.
Before the interstellar red dwarf
could even make it to Jupiter,
it would have to pass
through the Oort Cloud.
The Oort Cloud is a collection
of icy comets and other bodies
on the edge of our Solar System.
As the smallest star
in the known Universe
was passing through this icy debris,
it would wreak big havoc
in our planetary neighborhood.
Yeah, it would send icy comets our way,
and some of them
would start hitting Earth.
We'd have to think of a way
to protect our planet
from this comet shower.
But time would not be on our side.
Because the smallest star
in the Universe would keep moving
toward Jupiter.
Our stellar guest
might be smaller in size than Jupiter,
but it sure would be more massive.
EBLM J0555-57Ab's gravitational pull
would start to tug on the planet.
And don't forget that we'd now have
a second star in our Solar System.
Things would start getting hot.
All the heat from the red dwarf,
plus its strong gravity
would make Jupiter grow in size.
The gas giant's atmosphere
would puff up
as all the gases were heating up
and expanding.
Some of Jupiter's atmosphere
would start to escape into space
and toward the stellar intruder.
Eventually, all the runaway Jupiter gases
would form a hot ring
around EBLM J0555-57Ab.
It would look
as if we had a black hole
in the Solar System.
Only it would be really bright.
The red dwarf star
would keep slowly ripping Jupiter apart.
Now it would be eating whole chunks
of our gas giant.
For a moment,
Jupiter would take the shape
of an American football.
But soon enough,
the star would engulf it entirely.
Sorry, Jupiter.
You didn't stand a chance.
But now we'd be in a real pickle.
Jupiter would no longer
exist in the Solar System.
And now we'd have
an alien red dwarf star
surrounded by a ring of hot gases.
Our Solar System
wouldn't be the same without Jupiter.
This gas giant wasn't here
for a cool view.
Jupiter's gravity
usually attracts asteroids and comets
that make it into our planetary neighborhood.
It gobbles them up
before they make it further
into the Solar System.
With no Jupiter to protect us
from all the space rocks,
Earth would be getting bombarded
by all kinds of debris.
Icy comets, asteroids, you name it.
Every day
we'd be hit by about 170 meteors,
comets and asteroids.
That's ten times more
than what's making it to our planet
right now.
Life here would sure get more dangerous.
Who knows how long before
one really big asteroid
would come and destroy
all life on our planet.
But things would get even worse.
Having another star in our Solar System
would disrupt the orbits
of all the planets it passed.
Including Earth's.
Of course it would take
EBLM J0555-57Ab millions of years
to rampage all the way to our Sun.
So you might stay alive
long enough to witness
the epic slow motion chaos.
Unless the red dwarf sent another planet
on a collision course with us.
Yeah, that would end things
much, much quicker.
All the planetary collisions
in the Solar System
would create a rippling effect.
The planetary orbits would get disrupted
even more as time passed.
Earth could even get knocked
out of its orbit entirely.
This would send you
and everything else on the planet
on a rogue trip across the Universe.
And without the Sun to give us warmth,
the Earth would turn into a frigid,
lifeless rock very soon.
If you somehow survived up to this point,
you wouldn't have very long now.
Now, of all the things
that could enter our Solar System,
the smallest star in the Universe
might not be the worst.
How about a black hole?
Well, that's a story for another WHAT IF.