Our Universe 3D Page #6

They are made of organic

materials that dried

out after raining

onto Titan's surface.

With all these visual similarities to our

Earth, it's easy to imagine life here.

Because of the cold, it is impossible

for water-based life forms to exist,

but current data from Titan

has given us exciting clues.

Scientists speculate that there may

be methane-based organisms

that consume hydrogen

just in the way we consume oxygen.

No one knows what these creatures

could be like.

The course of action is clear, though.

We have to send more spacecraft,

probes and rovers out there

to look under every icy bit of rock.

Still, we have another interesting astral

body on our list that is mostly unexplored.

It's a dwarf planet, but it's much closer

than those in the Kuiper Belt.

There is another ring of asteroids located

between the orbits of Mars and Jupiter.

And, there, we find the icy world of Ceres.

The spacecraft Dawn will

be the first to visit here in 2015,

to provide detailed information.

But Ceres is also known

to be similar to Europa,

maybe it even has a subglacial ocean.

This is especially exciting, as even Earth

was once completely frozen over,

while life in the subglacial ocean

was retained.

There are many wonders to be found

out there, even in our own solar system.

So who can tell what the chances

of extraterrestrial life are

in the entire universe?

Look at this image.

At first glance, it

seems to be a typical

snapshot of our night

sky, with a lot of stars.

Actually, this isn't too far off.

The surprise is that the area we see here

is so small,

it's only a tenth the space the moon

takes up in our field of view.

And what we see shining

there aren't just stars.

No, all these little lights

are full-blown galaxies.

Just imagine that.

Behind a piece of our sky

about the size of a fingernail,

there are more than 10,000 galaxies.

Each galaxy contains

billions of solar systems,

so even if there is no other case

of intelligent life in our solar system,

what about the probability when we multiply

these chances by a trillion?

For now, we can only speculate,

and dream about the fascinating worlds

that could be waiting out there.

Out there in our universe.

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