The Search for a Second Earth

How the universe works

Are there other Earth-like planets filled with liquid oceans, rocky continents and life besides ours out there in space? This film (from “How the Universe Works” documentary series) gathers astronomers, experts and scientists as they seek the answer with spectroscopy, direct imaging and telescopes.

Their hope is to find evidence of atmospheres, magnetospheres and signs of life on planets in far away solar systems.

On Nov. 4, 2013, astronomers reported, based on Kepler space mission data, theorized there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarf stars within the Milky Way galaxy. 11 billion of these estimated planets may be orbiting Sun-like stars.

The interest towards finding another planet like Earth enhances the likelihood of possible complex extraterrestrial life. As such, it has long been speculated and the subject expressed in science, philosophy, science fiction and popular culture. Advocates of space colonization have long sought annother Earth as a “second home”, while advocates for space and survival would regard such a planet as a potential “new home” for humankind.

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The Search for a Second Earth
  • Info
  • Release dateSep 3, 2014
  • Full runtime42min
  • SeriesHow the Universe Works (season 3, episode 9)
  • Directed byMark Bridge