Paxi - Day, night, and the seasons — Transcript

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1. 0:00[Music]
2. 0:10hello there nice to see you again I've
3. 0:12had so many adventures in space lately
4. 0:15that I needed a
5. 0:17holiday I like to relax on the beautiful
6. 0:20beaches you have here on planet Earth
7. 0:23the Sun makes it lovely and warm I could
8. 0:26easily spend all day here but oh look
9. 0:30now the sun has gone when the sun sets
10. 0:33it's night time look at all the stars in
11. 0:36the sky we can see thousands from here
12. 0:40did you know that the sun is also a star
13. 0:43it is your star the sun rises every
14. 0:46morning making it daytime all the stars
15. 0:49we see at night are still there but
16. 0:51because the sun is the closest star to
17. 0:54Earth it is so bright we can't see the
18. 0:56fainter stars that are farther away the
19. 0:59Sun gives us light and warmth perfect
20. 1:02for my
21. 1:03holiday from down here it looks like the
22. 1:07sun and stars move around Earth but is
23. 1:10that what's really happening let's find
24. 1:12out to
25. 1:15action from space we can see that the
26. 1:18Earth is
27. 1:20spinning it's daytime for the side that
28. 1:23is facing the sun on the other side it's
29. 1:26nighttime the Earth spins on its axis an
30. 1:30imaginary tilted line that goes from the
31. 1:32North Pole to the South Pole from the
32. 1:36ground it looks like the sun and stars
33. 1:38are moving but in fact it is the earth
34. 1:41that is spinning although you can't
35. 1:44really feel it moving it's an optical
36. 1:47illusion it takes 24 hours for the earth
37. 1:50to make a full spin a whole day and
38. 1:56night as well as spinning on its axis
39. 1:59the Earth orbits the sun it takes the
40. 2:03earth
41. 2:04365 days and a quarter to make a
42. 2:07complete orbit around the Sun so every 4
43. 2:11years you add these quarter days
44. 2:13together and have a leap year which has
45. 2:16366 days during this time we experience
46. 2:21different seasons on Earth why is that
47. 2:24when sunlight reaches our planet it's
48. 2:27more concentrated in some places than
49. 2:29than in others in those places it's
50. 2:32warmer but because the Earth's axis is
51. 2:35tilted it's not always warm in the same
52. 2:38place on Earth for example in Europe
53. 2:42when the northern hemisphere is tilted
54. 2:44towards the sun it's summer there the
55. 2:47Sun appears to be very high in the sky
56. 2:50days are longer and warmer
57. 2:54hooray when the northern hemisphere is
58. 2:57tilted away from the sun it's wind to
59. 3:01there the Sun appears to be lower in the
60. 3:04sky so we get less light and less
61. 3:09warmth not so good for Beach holidays
62. 3:12but good for
63. 3:16stargazing winter and summer are the
64. 3:19other way around if you're in the
65. 3:21southern
66. 3:22hemisphere maybe I should take my winter
67. 3:25breaks in
68. 3:27Australia we've seen that the Sun is a
69. 3:30star that the Earth rotates on its axis
70. 3:33and this gives us day and night and that
71. 3:37the seasons change as the Earth orbits
72. 3:39the Sun
73. 3:44[Music]