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The Search for a Second Earth
How the Universe Works - S3 - E9
Is there another Earth out there with liquid oceans, rocky continents and life like us? Astronomers seek the answer with spectroscopy, direct imaging and telescopes. They hope to find evidence of atmospheres, magnetospheres and signs of life.
How the Universe Works: Season 3 - 9 Episode s
3x1 - Journey from the Center of the Sun
July 9, 2014
How does light escape from the sun? We take a journey from the centre of the sun, following the path of light. We witness its fiery birth from in the core, its 430,000 mile battle against gravity and magnetism, and its escape from the solar surface.
3x2 - The End of the Universe
July 16, 2014
How and when will the Universe end? Gravity and dark matter are poised to annihilate the Universe in a big crunch. Expansion and dark energy may tear it apart. Or, a phase transition could kill us tomorrow in a cosmic death bubble.
3x3 - Jupiter: Destroyer or Savior?
July 23, 2014
Beneath Jupiter's clouds lie our solar system's deepest secrets: from its violent youth, through the birth of life to the death of the sun. Scientists are discovering that the solar system, the Earth and every living thing exists because of Jupiter.
3x4 - First Second of the Big Bang
July 30, 2014
The first second of the Universe, the creation of everything when space, time, matter and energy burst into existence. It is the most important second in history, which seals the Universe’s fate and defines everything that comes after - including us.
3x5 - Is Saturn Alive?
August 6, 2014
Saturn’s secrets are out. The ferocious weather, the evolving ring system and the discovery of active geology on Saturn’s moons has rewritten the textbooks. Scientists are looking for life on Saturn’s moons and they may have found it on Titan.
3x6 - Weapons of Mass Extinction
August 13, 2014
Asteroids strike, planets collide, black holes blast out death rays, volcanoes erupt and ice engulfs the planet. These are the universe’s weapons of extinction. They’ve happened before - wiping out entire species, and they will happen again. Are we next?
3x7 - Did a Black Hole Build the Milky Way?
August 20, 2014
What built the Milky Way? New research might now have the answer, revealing an unlikely hero. At the heart of our galaxy sits a super massive black hole, one of the most destructive objects in the Universe. Could it be our creator?
3x8 - Our Voyage to the Stars
August 27, 2014
One day, a cosmic disaster will make life on Earth impossible. To survive, we must find a new home amongst the stars. Scientists are already developing new propulsion systems to take us to these distant worlds.
3x9 - The Search for a Second Earth
September 3, 2014
Is there another Earth out there with liquid oceans, rocky continents and life like us? Astronomers seek the answer with spectroscopy, direct imaging and telescopes. They hope to find evidence of atmospheres, magnetospheres and signs of life.