:00:11. > :00:12.Morning everyone, Leah here with today's Newsround.
:00:13. > :00:15.First, in a few hours' time, one of the most ground-breaking,
:00:16. > :00:20.epic space missions of our time, will reach its grand finale.
:00:21. > :00:50.After launching in 2004, it took Rosetta ten years to catch
:00:51. > :00:56.After such a long journey, you'd hope things wouldn't
:00:57. > :01:04.In 2014, Rosetta tried to attach a special space probe called
:01:05. > :01:11.But instead, it bounced a few times and got stuck
:01:12. > :01:17.Bad news for a space probe that's powered by sunlight.
:01:18. > :01:21.With no sunlight, Philae's batteries ran out after just three days.
:01:22. > :01:32.In 2015, Philae woke up from hibernation as the comet it's
:01:33. > :01:39.on got nearer to the sun and sent back lots of information to Earth.
:01:40. > :01:42.And in 2016, the location of Philae was discovered.
:01:43. > :01:45.It was wedged in a dark crack on the comet.
:01:46. > :01:50.While all this has been happening, the Rosetta spacecraft was orbiting
:01:51. > :01:54.around the comet but now its journey is coming to an end with a bang.
:01:55. > :02:00.Rosetta will join Philae by crashing into the surface of the comet,
:02:01. > :02:04.sending lots more info back to Earth in the process,
:02:05. > :02:14.Well, Rosetta's had quite a journey and joining me now to talk
:02:15. > :02:21.about it is space expert, Dr Sarah Crowther.
:02:22. > :02:28.Thank you for joining us. Such an important day-to-day. What will
:02:29. > :02:33.Rosetta teach us? It has been a static mission where we have learned
:02:34. > :02:37.a lot about comets and how they behave. It was ground-breaking
:02:38. > :02:40.because Rosetta was the first spacecraft to orbit the comet and
:02:41. > :02:47.the Philae lander was the first to land on a comet. They have taken
:02:48. > :02:51.hundreds of pictures, analyse the dust on the comet so we have learned
:02:52. > :02:55.a lot about what they are made of and how they behave. Why does it
:02:56. > :02:59.have to end now? It is a shame but the comet is moving away from the
:03:00. > :03:02.sun and the spacecraft is powered by the Sun said there is not enough
:03:03. > :03:07.energy to keep it going. So they will crash it into the surface this
:03:08. > :03:11.morning and as it gets close to the surface, we will get close up photos
:03:12. > :03:15.of the surface and we will be able to take data as well. So exciting
:03:16. > :03:20.when we get those pictures. Thank you for joining us!
:03:21. > :03:23.Next, Syria used to be a country where children lived normal lives,
:03:24. > :03:24.going to school, playing with friends and
:03:25. > :03:28.That isn't possible any more because of the war that's
:03:29. > :03:32.Now in the country's biggest city, Aleppo, there are signs that it
:03:33. > :03:42.For more than five years, Syria has been at war.
:03:43. > :03:44.Different groups are fighting for power and control
:03:45. > :03:52.Meanwhile millions of Syrians have been forced to leave the country
:03:53. > :03:57.and find a safer place to live, but some families have had no choice
:03:58. > :04:03.Around four million people live in Aleppo today.
:04:04. > :04:11.Right now, Aleppo is split with a number of groups controlling
:04:12. > :04:14.different parts of the city and there's awful fighting
:04:15. > :04:20.The BBC's James Longman is in Lebanon, a country next
:04:21. > :04:24.to Syria, he's been reporting on the crisis in the area.
:04:25. > :04:28.You can see how many buildings have been destroyed over
:04:29. > :04:33.People living here have been cut off from food, from medicine,
:04:34. > :04:40.So life has been very, very difficult.
:04:41. > :04:44.As you can see from these pictures, much of Aleppo has been destroyed.
:04:45. > :04:46.Bombs have been dropped onto streets, killing
:04:47. > :04:51.people and leaving behind these large craters.
:04:52. > :04:55.Many children are the victims of this conflict.
:04:56. > :04:57.Syrians tend to have large families and there are lots of children
:04:58. > :05:02.Some say that maybe half of all the people who have been
:05:03. > :05:06.killed or injured in Syria, in eastern Aleppo, are children.
:05:07. > :05:13.Parts of the city have no clean water and vital supplies like food
:05:14. > :05:18.Still these children are trying to get by and doing what they can
:05:19. > :05:29.Some say compared to five years ago, the city is hardly recognisable.
:05:30. > :05:37.And no one knows when the conflict will come to an end.
:05:38. > :05:41.And if anything in the news upsets you there's lots of advice
:05:42. > :05:48.That's also where you'll find our full guide to what's
:05:49. > :05:53.That's all from me, Newsround's back at 4:20pm this afternoon.