Paxi and cleaning up space — Transcript

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1. 0:00[Music]
2. 0:11hello it's paxy here
3. 0:14isn't life on earth wonderful
4. 0:16we enjoy life on earth and look after it
5. 0:19with the help of lots of satellites they
6. 0:22work just above the earth in what
7. 0:24scientists call low earth orbit
8. 0:28let's go and take a look at what's
9. 0:30happening there
10. 0:31why do you need to take this orbit
11. 0:34i need to be here to observe the earth
12. 0:37and track its health and that's very
13. 0:39important and i need to help some people
14. 0:42with their internet connection
15. 0:44this is very important
16. 0:46uh-oh
17. 0:48it's getting a little crowded here
18. 0:51many very useful satellites are in low
19. 0:54earth orbit which is pretty close to us
20. 0:57humans send them here because you need
21. 0:59less energy and so less rocket fuel to
22. 1:03place them here compared to farther out
23. 1:05in space
24. 1:06but above all these satellites need to
25. 1:10be close to earth in order to do their
26. 1:12jobs
27. 1:13like taking pictures of earth or
28. 1:15connecting people who live in isolated
29. 1:18areas of the world to the internet
30. 1:20[Music]
31. 1:22hey be careful you hit me i've completed
32. 1:26my mission but i can't come back to
33. 1:28earth by myself
34. 1:30help
35. 1:31oh no
36. 1:32this situation is getting out of control
37. 1:35i need help to sort this out
38. 1:38wait
39. 1:39perhaps we can do something to improve
40. 1:42this space debris jam can we use some
41. 1:44kind of tool to grab these satellites
42. 1:47and bring them back
43. 1:49maybe a net or a robotic arm
44. 1:55perhaps one of these types of satellites
45. 1:58can help remove out of service
46. 2:00satellites and broken pieces
47. 2:02this space debris by guiding them safely
48. 2:05to earth
49. 2:08oh
50. 2:09now that's better
51. 2:11many of the satellites in space can't
52. 2:14deorbit and return to earth at the end
53. 2:16of their missions without help from
54. 2:18other satellites can you think of tools
55. 2:20that could help satellites deorbit
56. 2:22themselves
57. 2:24engineers and scientists are testing
58. 2:26drag sails which are like ship sails to
59. 2:30slow satellites down so they can fall
60. 2:32toward earth and disintegrate or burn up
61. 2:35in the atmosphere this way they leave
62. 2:38the space free for other satellites
63. 2:40without causing any damage back on earth
64. 2:43but
65. 2:44this only works for small satellites
66. 2:47what do we do with the bigger ones
67. 2:50larger satellites need more help
68. 2:52they could carry extra fuel in their
69. 2:55tanks enough to send them back to earth
70. 2:57or even have extra motors that switch on
71. 3:00at the end of their mission that push
72. 3:02them toward the ocean
73. 3:10all this makes me think that we need to
74. 3:12keep earth orbits as clean as possible
75. 3:14from space debris so that all our
76. 3:17satellites can work at their best
77. 3:19we also need to take care of earth in
78. 3:22every way possible my friends
79. 3:24we need to find more eco-friendly ways
80. 3:27to lift our rockets and to design and
81. 3:29build our spacecraft so they continue to
82. 3:32protect earth without contaminating it
83. 3:35[Music]
84. 3:36you can also help protect earth by
85. 3:39reducing reusing and recycling
86. 3:43today we've learned that
87. 3:45satellites orbiting earth can help us by
88. 3:48studying our planet and connecting us to
89. 3:50one another
90. 3:52there are many old satellites and broken
91. 3:54pieces of them called space debris
92. 3:57orbiting the earth that can harm active
93. 3:59spacecraft
94. 4:01tools like robotic arms or nets may help
95. 4:04remove out-of-service satellites from
96. 4:06orbit designing satellites that can
97. 4:09return to earth on their own is a great
98. 4:11way to keep space free of debris
99. 4:14building eco-friendly spacecraft is
100. 4:16important to protect earth without
101. 4:18contaminating it
102. 4:20you can also help protect earth by
103. 4:22reducing reusing and recycling
104. 4:27[Music]