0:00:02 > 0:00:05You're watching Newsround, live this Thursday with me, Ayshah,
0:00:05 > 0:00:07with all of this on the way.
0:00:07 > 0:00:10The space launch looking into exploding stars.
0:00:10 > 0:00:16And what to get twin panda babies for their birthday?
0:00:24 > 0:00:26But first we're talking about the future of our planet
0:00:26 > 0:00:29and what you guys think we should be doing to improve it.
0:00:29 > 0:00:30Right now countries around the world are involved in a big meeting
0:00:32 > 0:00:33about how to stop climate change.
0:00:33 > 0:00:39So I went to a school in Bristol to get your ideas.
0:00:39 > 0:00:42Climate change is important to me because the world needs to be
0:00:42 > 0:00:45a greener place for everyone to live in.
0:00:45 > 0:00:52Because I like fluffy animals and if the water is rising and it is
0:00:52 > 0:00:55getting warmer, it may melt all of the cold animals' habitats.
0:00:55 > 0:01:01I think it's important because if we don't act fast,
0:01:01 > 0:01:06then our world will get really hot and we don't want that to happen.
0:01:06 > 0:01:09We are here in Bristol because it has been named as
0:01:09 > 0:01:11the European Green capital in 2015.
0:01:11 > 0:01:15And the kids in the city get special lessons on about the environment.
0:01:15 > 0:01:17So what are they doing to help?
0:01:17 > 0:01:20At school, we have the green committee and they
0:01:20 > 0:01:28go round every classroom and recycle all the paper, cardboard, plastic.
0:01:28 > 0:01:35We do monitoring, where every turn off the lights to make sure
0:01:35 > 0:01:42that it doesn't get too hot.
0:01:42 > 0:01:44At home, sometimes I remind my parents to
0:01:44 > 0:01:48recycle stuff, last month I asked my mum if I could keep my Fanta bottle
0:01:48 > 0:01:50to make a rocket ship out of it.
0:01:50 > 0:01:53There is a big meeting in Paris at the moment but what would these
0:01:53 > 0:01:55guys do if they were in charge?
0:01:55 > 0:01:57I would say, try and reduce the amount of fossil
0:01:57 > 0:01:59fuels we use in cars and vehicles.
0:01:59 > 0:02:01What would you say to the leaders in charge?
0:02:01 > 0:02:03I would say, if one species of animal got endangered,
0:02:03 > 0:02:07there is nothing we could do about it, so act fast, David Cameron.
0:02:07 > 0:02:10All we need you to do is to help recycle and save the world.
0:02:10 > 0:02:13My message would be to them to clean our oceans.
0:02:13 > 0:02:15Why?
0:02:15 > 0:02:19Because there's lots of pollution going in it.
0:02:19 > 0:02:23I would say to David Cameron, if you listen to a child's opinion,
0:02:23 > 0:02:27it could change the world.
0:02:28 > 0:02:30There's more on the Newsround web site about
0:02:30 > 0:02:35climate change and what's being talked about at the conference.
0:02:35 > 0:02:38OK, let's talk about whether Britain should be sending planes to bomb
0:02:38 > 0:02:40parts of Syria now.
0:02:40 > 0:02:42Last night UK politicians had a big debate and vote on
0:02:42 > 0:02:46whether drop bombs on some areas as part of a plan to tackle
0:02:46 > 0:02:50so called Islamic State, the group responsible for carrying
0:02:50 > 0:02:52out attacks on Paris last month.
0:02:52 > 0:02:55Well, more MPs voted yes than no so this morning
0:02:55 > 0:02:57the first planes set off for Syria.
0:02:57 > 0:03:03The BBC's Jonathan Beale saw them leave.
0:03:04 > 0:03:09The first pair of RAF Tornadoes to leave after MPs authorised military
0:03:09 > 0:03:14action in Syria against Islamic State have just returned.
0:03:14 > 0:03:16They left with, each, three Paveway bombs and they have
0:03:16 > 0:03:21come back with some of those weapons at least clearly having been fired.
0:03:21 > 0:03:25This is effectively the first time that RAF planes have
0:03:25 > 0:03:30carried out air strikes over Syria, we are expecting confirmation later
0:03:30 > 0:03:33in the day of where they were, what they hit and what
0:03:33 > 0:03:38the impact of those strikes was.
0:03:38 > 0:03:41And there's much more about the background to all this
0:03:41 > 0:03:43on the Newsround website including what Islamic State is and the events
0:03:43 > 0:03:48in Paris that led to this vote.
0:03:48 > 0:03:51Now, a space probe has been launched this morning to find out more
0:03:51 > 0:03:55about gravity, including what happens when a star explodes.
0:03:55 > 0:03:56The Lisa Pathfinder mission will carry out some big experiments
0:03:59 > 0:04:01Martin's got more.
0:04:01 > 0:04:05After months of preparations and intense training, a 30 metre tall
0:04:05 > 0:04:07rocket took off from South America.
0:04:07 > 0:04:10It will travel 1.5 million kilometres from Earth.
0:04:10 > 0:04:14Once it reaches its orbit, it will release a satellite called
0:04:14 > 0:04:19the Lisa Pathfinder.
0:04:19 > 0:04:22There is no one on board so it will be controlled
0:04:22 > 0:04:27around the clock by experienced teams at the European Space Agency.
0:04:27 > 0:04:30Once it's in position, it will do loads of experiments.
0:04:30 > 0:04:32It will use lots of new high-tech equipment to try
0:04:32 > 0:04:35and measure something called gravitational waves.
0:04:35 > 0:04:38These are ripples in space-time, the very fabric of the universe.
0:04:38 > 0:04:44They are caused by massive events in space like when two black holes
0:04:44 > 0:04:45collide and merge.
0:04:45 > 0:04:51A black hole is thought to be a dying star that collapsed inwards
0:04:51 > 0:04:52from its own weight.
0:04:52 > 0:04:55Its pull of gravity becomes so strong that even light can't escape,
0:04:55 > 0:04:57which is why it looks black.
0:04:57 > 0:04:59British scientist Harry Ward has helped develop some of
0:04:59 > 0:05:05the equipment that has been used.
0:05:05 > 0:05:07We have got two things that are floating freely in space
0:05:07 > 0:05:09and we're trying to measure the distance between them.
0:05:09 > 0:05:12And the way we make those measurements is to shine laser beams
0:05:12 > 0:05:15backwards and forwards, and the laser beams act as a kind of ruler.
0:05:15 > 0:05:18All the things that direct the laser beams have to be incredibly well
0:05:18 > 0:05:21lined up and incredibly stable and that's what this device here does.
0:05:21 > 0:05:24It's a very special material that hardly changes at all
0:05:24 > 0:05:25when the temperature changes.
0:05:25 > 0:05:27Strong enough that it can survive the rather extreme
0:05:27 > 0:05:30journey it's about to undertake.
0:05:30 > 0:05:31The experiments will help scientists learn more
0:05:31 > 0:05:35about how the universe works.
0:05:35 > 0:05:38Last up, how do you say happy birthday to a panda?
0:05:38 > 0:05:39With a pink cake of course.
0:05:39 > 0:05:42These twin pandas are celebrating their first birthday at a zoo in
0:05:42 > 0:05:50Japan and were given the sweet treat which is made entirely out of ice.
0:05:50 > 0:05:53That's all from me, Newsround's back at 4.20pm with Ricky. See you soon!