0:00:13 > 0:00:16Hi guys, Ricky here with your Monday news update.
0:00:16 > 0:00:19First up we all know that space is pretty huge, right?
0:00:19 > 0:00:23But just how big actually is it?
0:00:23 > 0:00:31Yes it's the Big Question.
0:00:40 > 0:00:45Hi, I'm Sarah Bosman and I am an astrophysicist at UCL.
0:00:45 > 0:00:48I study mostly the early universe.
0:00:48 > 0:00:50Space is really enormous.
0:00:50 > 0:00:53It's so big that it's kind of hard to imagine.
0:00:53 > 0:00:55The units we use on Earth, like kilometres or miles,
0:00:55 > 0:00:58don't even make sense to apply to space because you'll
0:00:58 > 0:01:01just get too many zeros if you try to think of it that way.
0:01:01 > 0:01:04So astronomers have to come up with a whole new unit
0:01:04 > 0:01:06to measure distances in space, which is a light year.
0:01:06 > 0:01:10So for instance, a galaxy is 100,000 light years
0:01:10 > 0:01:12from one edge to the other.
0:01:12 > 0:01:13from one edge to the other.
0:01:13 > 0:01:16That means if you are travelling at the speed of light,
0:01:16 > 0:01:19which is the fastest you can ever go, it will still take you 100,000
0:01:19 > 0:01:24years from one edge to the other.
0:01:24 > 0:01:27And that's only how big one galaxy is, so if we look outside
0:01:27 > 0:01:30of our galaxy to how many other galaxies there are, we just study
0:01:30 > 0:01:33small patches of the sky and count how many there in each small patch.
0:01:33 > 0:01:36And the amount of galaxies we think are in the universe,
0:01:36 > 0:01:39it's about two trillion galaxies, which is a ridiculous number.
0:01:39 > 0:01:42So if you took all those galaxies and split them
0:01:42 > 0:01:45among everyone on Earth, each person would have about 250
0:01:45 > 0:01:46galaxies all to themselves.
0:01:46 > 0:01:49And that's only the space we know about.
0:01:49 > 0:01:54Beyond that, there could be even more space.
0:01:54 > 0:01:58Ok, next up it's the special orchestra making Norway really cool!
0:01:58 > 0:02:04Watch this!
0:02:04 > 0:02:08There is something pretty cool about this music.
0:02:08 > 0:02:13It is being played on instruments made out of ice!
0:02:13 > 0:02:15Brr!
0:02:15 > 0:02:19It is part of an ice music festival in
0:02:19 > 0:02:22Finse, a mountain village in Norway.
0:02:22 > 0:02:26In winter, it can only be reached by train and it is very cold
0:02:26 > 0:02:30up there.
0:02:30 > 0:02:32But before they can play, they have to carve their
0:02:32 > 0:02:36instruments.
0:02:36 > 0:02:38They have made iced drums, horns, and even a
0:02:38 > 0:02:39didgeridoo.
0:02:39 > 0:02:41This is an iceophone.
0:02:41 > 0:02:44Good sounding ice is the most difficult part, you cannot just go
0:02:44 > 0:02:47to your freezer, you cannot just go to the nearest lake.
0:02:47 > 0:02:49It is kind of the sound of nature, it does not
0:02:49 > 0:02:52sound like anything else you have ever heard.
0:02:52 > 0:02:53People are really surprised when they hear it for the
0:02:53 > 0:02:56first time.
0:02:56 > 0:02:57In Finse, the temperature can drop below -20
0:02:57 > 0:02:58degrees.
0:02:58 > 0:03:05But the colder it is, the better it is for playing nice.
0:03:05 > 0:03:07It makes them send much clearer. the better it is for playing nice.
0:03:07 > 0:03:09We don't get to practice, so the music
0:03:09 > 0:03:11gets made on stage in front of the audience.
0:03:11 > 0:03:12That is really special.
0:03:12 > 0:03:13People are like, what!
0:03:13 > 0:03:15How is this possible!
0:03:15 > 0:03:18It is almost not possible, so it is pretty cool that we can do
0:03:18 > 0:03:20it.
0:03:20 > 0:03:23Right, that is it, next time it's those I am going to make my own
0:03:23 > 0:03:24harp.
0:03:24 > 0:03:27Where is the ice?
0:03:27 > 0:03:30Now many of you might have got flowers for your mum on mothers
0:03:30 > 0:03:32day, but how about this for a fancy display?
0:03:32 > 0:03:34Is that Usain Bolt and the minions?!
0:03:34 > 0:03:37This is the famous San Remo flower festival in Italy.
0:03:37 > 0:03:40One of the big themes this year was sport and you could see
0:03:40 > 0:03:48footballers, horse riders and even racing cars as part of the show.
0:03:48 > 0:03:51Last up, we've all been enjoying the Winter Olympics and Paralympics -
0:03:51 > 0:03:54but Martin has found a sport where the people do winter sports,
0:03:54 > 0:04:00with a wee bit of a difference.
0:04:00 > 0:04:06Boys girls, we are in southern Poland.
0:04:06 > 0:04:12Poland. Ski splash is an event that takes place in this week town, every
0:04:12 > 0:04:19air. As you can see, it is a real hoot. 30 participants attempt to ski
0:04:19 > 0:04:27or snowboard across a pool of very cold water. It combines some good
0:04:27 > 0:04:33old sense of humour, with foam and sports competition. The best part
0:04:33 > 0:04:40about it is that the comp editors can dress up in anything they like.
0:04:40 > 0:04:48I know what my next hobby is. Head online to see why this rescue dog
0:04:48 > 0:04:51stole the show at Crufts.
0:04:51 > 0:04:59That's it from me, Newsround's back at 7.20 tomorrow.