12/03/2018 Newsround

Hi guys, Ricky here

with your Monday news update.

First up we all know that space

is pretty huge, right?

But just how big actually is it?

Yes it's the Big Question.

Hi, I'm Sarah Bosman and I am

an astrophysicist at UCL.

I study mostly the early universe.

Space is really enormous.

It's so big that it's

kind of hard to imagine.

The units we use on Earth,

like kilometres or miles,

don't even make sense to apply

to space because you'll

just get too many zeros

if you try to think of it that way.

So astronomers have to come up

with a whole new unit

to measure distances in space,

which is a light year.

So for instance, a galaxy

is 100,000 light years

from one edge to the other.

from one edge to the other.

That means if you are travelling

at the speed of light,

which is the fastest you can ever

go, it will still take you 100,000

years from one edge to the other.

And that's only how big one galaxy

is, so if we look outside

of our galaxy to how many other

galaxies there are, we just study

small patches of the sky and count

how many there in each small patch.

And the amount of galaxies we think

are in the universe,

it's about two trillion galaxies,

which is a ridiculous number.

So if you took all those

galaxies and split them

among everyone on Earth,

each person would have about 250

galaxies all to themselves.

And that's only the

space we know about.

Beyond that, there could

be even more space.

Ok, next up it's the special

orchestra making Norway really cool!

Watch this!

There is something pretty

cool about this music.

It is being played

on instruments made out of ice!

Brr!

It is part of an ice

music festival in

Finse, a mountain village in Norway.

In winter, it can only be reached

by train and it is very cold

up there.

But before they can play,

they have to carve their

instruments.

They have made iced

drums, horns, and even a

didgeridoo.

This is an iceophone.

Good sounding ice is the most

difficult part, you cannot just go

to your freezer, you cannot just go

to the nearest lake.

It is kind of the sound

of nature, it does not

sound like anything else

you have ever heard.

People are really surprised

when they hear it for the

first time.

In Finse, the temperature

can drop below -20

degrees.

But the colder it is,

the better it is for playing nice.

It makes them send much clearer.

the better it is for playing nice.

We don't get to

practice, so the music

gets made on stage in

front of the audience.

That is really special.

People are like, what!

How is this possible!

It is almost not possible,

so it is pretty cool that we can do

it.

Right, that is it, next time it's

those I am going to make my own

harp.

Where is the ice?

Now many of you might have got

flowers for your mum on mothers

day, but how about this

for a fancy display?

Is that Usain

Bolt and the minions?!

This is the famous San Remo

flower festival in Italy.

One of the big themes this year

was sport and you could see

footballers, horse riders and even

racing cars as part of the show.

Last up, we've all been enjoying the

Winter Olympics and Paralympics -

but Martin has found a sport

where the people do winter sports,

with a wee bit of a difference.

Boys girls, we are in southern

Poland.

Poland. Ski splash is an event that

takes place in this week town, every

air. As you can see, it is a real

hoot. 30 participants attempt to ski

or snowboard across a pool of very

cold water. It combines some good

old sense of humour, with foam and

sports competition. The best part

about it is that the comp editors

can dress up in anything they like.

I know what my next hobby is. Head

online to see why this rescue dog

stole the show at Crufts.

That's it from me, Newsround's

back at 7.20 tomorrow.