Orbit: Earth's Extraordinary Journey

Every year, planet Earth completes an extraordinary 584 million mile journey around the sun, whilst at the same time spinning at an astonishing 64,000 mph on its tilted axis. This spin, orbit and and tilt has a profound influence on our world and every life-form it sustains... It determines the hous of light and darkness, the climate zones of the world ranging from the lands of ice and snow at the poles, through the temperate and desert regions to the lush vegetation and complex ecosystems of the rain forests along the equator. It is responsible for wind routes and weather patterns, whilst in the oceans it causes the formation of currents and the action of the tides.

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  • Tilt
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    March 5, 2013

    In this final episode we complete our journey, travelling back from the March equinox to the end of June. Kate Humble is in the Arctic at a place where Spring arrives with a bang, whilst Helen Czerski chases a tornado to show how the earth's angle of tilt creates the most extreme weather on earth.

  • Orbit
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    February 26, 2013

    Kate & Helen follow the sun from January through to the spring equinox. The programme reveals some of the astonishing consequences of being locked in an eternal voyage around the sun and how changes in the earth's orbit have shaped our planet.

  • Spin
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    February 19, 2013