The Earth might not be here forever.
A huge solar flare,
an asteroid impact, or
a local gamma-ray burst -
anything could wipe us out for good.
If we're looking for someplace to escape to,
there is one planet in our Solar System
that's somewhat similar to Earth.
Though we don't know much about it.
Not only are Earth and Venus
about the same size,
they both have identical interiors
with partially liquid cores,
mantles and crusts.
Yet, Venus happens to be
the most hostile terrestrial planet
in the Solar System.
But what if I told you
that you could explore this hot planet
without ever setting foot on it?
Venus isn't a place you'd want to land on.
Thanks to its dense atmosphere and
and turtle-like rotation,
the surface temperature of Venus
stays at 462°C (863.6°F).
The planet's atmospheric pressure
is 92 times greater than Earth's.
Because of such high pressure,
anything entering the atmosphere of Venus
gets immediately crushed before it reaches
the planet's volcanic surface.
With such extreme atmospheric conditions,
it's too dangerous to attempt a manned landing on Venus.
But we wouldn't need to go down there.
Above the dense layer of clouds,
Venus isn't that bad.
The atmospheric pressure is similar to Earth's.
The gravity is slightly lower.
And the temperature reaches 75°C (167°F).
Although that's a little hot,
it's still workable.
We'd need to start small.
According to NASA's plan for exploring Venus,
we'd send two spaceships to our destination.
Venus is the closest planet to Earth.
That's why it would only take 100 days
for the craft to arrive there.
One of the ships would be run by robots.
It would carry a special airship
that it would eject into the atmosphere upon arrival.
This airship would start to inflate itself with helium.
Since helium is lighter than air,
the airship would float,
orbiting about 52 km (32 mi) above the planet.
The second spaceship would have a crew of two people.
It would link up with the airship orbiting Venus.
The crew would have 30 days
to make all the environmental assessments.
After that, they'd detach from the airship
and start making their way back to Earth.
The return trip would take about 300 days
due to the Sun's strong gravitational pull.
But even with that, the complete mission
wouldn't take longer than 450 days.
After analyzing the information from the first mission,
we'd begin to plan our next trip to Venus.
But this time, we'd stay there longer.
The next crew would have a year
to study the planet and its atmosphere.
One of the things they'd be looking for on Venus would be life.
Scientists think that
because microbes on Earth can thrive
in acidic conditions surrounded by sulfur,
there could be life found in the Venusian atmosphere.
After the end of the second mission,
we would start preparing to stay on Venus permanently.
We would begin building cloud cities,
where future generations of humans
would live and hopefully continue to explore space
and the origins of life in it.
They might even solve the pressure problem.
From there, they would terraform the planet
and settle down on the once hostile Venusian surface.
But that's a story for another WHAT IF.