Terra: The Nature of Our World Terra: The Nature of Our World LifeOnTERRA ("TERRA: The Nature of Our World"), now in its tenth season, is the award-winning science and natural history podcast series that explores the natural connections that propel life on Earth. Overseen by graduate students in the MFA program in Science and Natural History Filmmaking at Montana State University, LifeOnTERRA distributes independently produced science, nature, cultural, and environmental films. The content of these podcasts are contributed by numerous independent filmmakers, lending their talent and voices to issues concerning life here on planet earth. Our World. Your Stories. The site provides a full archive of
Fictional planets of the Solar System while yet others are purely fictional and were never intended as serious hypotheses about the structure of the Solar System. Vulcan was a hypothetical planet supposed to revolve around the Sun inside the orbit of Mercury, invoked to explain certain irregularities in Mercury's orbit. The planet was proposed as a hypothesis in 1859, and abandoned not later than 1915. The name "Vulcan" has been used for various other fictional planets, in and out of the Solar System, that do not correspond to the hypothetical planet Vulcan. The planet Vulcan in the "Star Trek" franchise, for instance, is specified as orbiting